shoehorning graphql, step functions and lamdas. aws deployment scripts

api/graphql.py

@@ -0,0 +1,251 @@
+"""
+GraphQL API using graphene, mounted on FastAPI/Starlette.
+
+Provides the same data as the REST API but via GraphQL queries and mutations.
+Uses Django ORM directly for data access.
+Types are generated from schema/ via modelgen — see api/schemas/graphql_types.py.
+"""
+
+import os
+
+import graphene
+
+from api.schemas.graphql_types import (
+    CreateJobInput,
+    MediaAssetType,
+    ScanResultType,
+    SystemStatusType,
+    TranscodeJobType,
+    TranscodePresetType,
+)
+from core.storage import BUCKET_IN, list_objects
+
+# Media extensions (same as assets route)
+VIDEO_EXTS = {".mp4", ".mkv", ".avi", ".mov", ".webm", ".flv", ".wmv", ".m4v"}
+AUDIO_EXTS = {".mp3", ".wav", ".flac", ".aac", ".ogg", ".m4a"}
+MEDIA_EXTS = VIDEO_EXTS | AUDIO_EXTS
+
+
+# ---------------------------------------------------------------------------
+# Queries
+# ---------------------------------------------------------------------------
+
+
+class Query(graphene.ObjectType):
+    assets = graphene.List(
+        MediaAssetType,
+        status=graphene.String(),
+        search=graphene.String(),
+    )
+    asset = graphene.Field(MediaAssetType, id=graphene.UUID(required=True))
+    jobs = graphene.List(
+        TranscodeJobType,
+        status=graphene.String(),
+        source_asset_id=graphene.UUID(),
+    )
+    job = graphene.Field(TranscodeJobType, id=graphene.UUID(required=True))
+    presets = graphene.List(TranscodePresetType)
+    system_status = graphene.Field(SystemStatusType)
+
+    def resolve_assets(self, info, status=None, search=None):
+        from mpr.media_assets.models import MediaAsset
+
+        qs = MediaAsset.objects.all()
+        if status:
+            qs = qs.filter(status=status)
+        if search:
+            qs = qs.filter(filename__icontains=search)
+        return qs
+
+    def resolve_asset(self, info, id):
+        from mpr.media_assets.models import MediaAsset
+
+        try:
+            return MediaAsset.objects.get(id=id)
+        except MediaAsset.DoesNotExist:
+            return None
+
+    def resolve_jobs(self, info, status=None, source_asset_id=None):
+        from mpr.media_assets.models import TranscodeJob
+
+        qs = TranscodeJob.objects.all()
+        if status:
+            qs = qs.filter(status=status)
+        if source_asset_id:
+            qs = qs.filter(source_asset_id=source_asset_id)
+        return qs
+
+    def resolve_job(self, info, id):
+        from mpr.media_assets.models import TranscodeJob
+
+        try:
+            return TranscodeJob.objects.get(id=id)
+        except TranscodeJob.DoesNotExist:
+            return None
+
+    def resolve_presets(self, info):
+        from mpr.media_assets.models import TranscodePreset
+
+        return TranscodePreset.objects.all()
+
+    def resolve_system_status(self, info):
+        return {"status": "ok", "version": "0.1.0"}
+
+
+# ---------------------------------------------------------------------------
+# Mutations
+# ---------------------------------------------------------------------------
+
+
+class ScanMediaFolder(graphene.Mutation):
+    class Arguments:
+        pass
+
+    Output = ScanResultType
+
+    def mutate(self, info):
+        from mpr.media_assets.models import MediaAsset
+
+        objects = list_objects(BUCKET_IN, extensions=MEDIA_EXTS)
+        existing = set(MediaAsset.objects.values_list("filename", flat=True))
+
+        registered = []
+        skipped = []
+
+        for obj in objects:
+            if obj["filename"] in existing:
+                skipped.append(obj["filename"])
+                continue
+            try:
+                MediaAsset.objects.create(
+                    filename=obj["filename"],
+                    file_path=obj["key"],
+                    file_size=obj["size"],
+                )
+                registered.append(obj["filename"])
+            except Exception:
+                pass
+
+        return ScanResultType(
+            found=len(objects),
+            registered=len(registered),
+            skipped=len(skipped),
+            files=registered,
+        )
+
+
+class CreateJob(graphene.Mutation):
+    class Arguments:
+        input = CreateJobInput(required=True)
+
+    Output = TranscodeJobType
+
+    def mutate(self, info, input):
+        from pathlib import Path
+
+        from mpr.media_assets.models import MediaAsset, TranscodeJob, TranscodePreset
+
+        try:
+            source = MediaAsset.objects.get(id=input.source_asset_id)
+        except MediaAsset.DoesNotExist:
+            raise Exception("Source asset not found")
+
+        preset = None
+        preset_snapshot = {}
+        if input.preset_id:
+            try:
+                preset = TranscodePreset.objects.get(id=input.preset_id)
+                preset_snapshot = {
+                    "name": preset.name,
+                    "container": preset.container,
+                    "video_codec": preset.video_codec,
+                    "audio_codec": preset.audio_codec,
+                }
+            except TranscodePreset.DoesNotExist:
+                raise Exception("Preset not found")
+
+        if not preset and not input.trim_start and not input.trim_end:
+            raise Exception("Must specify preset_id or trim_start/trim_end")
+
+        output_filename = input.output_filename
+        if not output_filename:
+            stem = Path(source.filename).stem
+            ext = preset_snapshot.get("container", "mp4") if preset else "mp4"
+            output_filename = f"{stem}_output.{ext}"
+
+        job = TranscodeJob.objects.create(
+            source_asset_id=source.id,
+            preset_id=preset.id if preset else None,
+            preset_snapshot=preset_snapshot,
+            trim_start=input.trim_start,
+            trim_end=input.trim_end,
+            output_filename=output_filename,
+            output_path=output_filename,
+            priority=input.priority or 0,
+        )
+
+        # Dispatch
+        executor_mode = os.environ.get("MPR_EXECUTOR", "local")
+        if executor_mode == "lambda":
+            from task.executor import get_executor
+
+            get_executor().run(
+                job_id=str(job.id),
+                source_path=source.file_path,
+                output_path=output_filename,
+                preset=preset_snapshot or None,
+                trim_start=input.trim_start,
+                trim_end=input.trim_end,
+                duration=source.duration,
+            )
+        else:
+            from task.tasks import run_transcode_job
+
+            result = run_transcode_job.delay(
+                job_id=str(job.id),
+                source_key=source.file_path,
+                output_key=output_filename,
+                preset=preset_snapshot or None,
+                trim_start=input.trim_start,
+                trim_end=input.trim_end,
+                duration=source.duration,
+            )
+            job.celery_task_id = result.id
+            job.save(update_fields=["celery_task_id"])
+
+        return job
+
+
+class CancelJob(graphene.Mutation):
+    class Arguments:
+        id = graphene.UUID(required=True)
+
+    Output = TranscodeJobType
+
+    def mutate(self, info, id):
+        from mpr.media_assets.models import TranscodeJob
+
+        try:
+            job = TranscodeJob.objects.get(id=id)
+        except TranscodeJob.DoesNotExist:
+            raise Exception("Job not found")
+
+        if job.status not in ("pending", "processing"):
+            raise Exception(f"Cannot cancel job with status: {job.status}")
+
+        job.status = "cancelled"
+        job.save(update_fields=["status"])
+        return job
+
+
+class Mutation(graphene.ObjectType):
+    scan_media_folder = ScanMediaFolder.Field()
+    create_job = CreateJob.Field()
+    cancel_job = CancelJob.Field()
+
+
+# ---------------------------------------------------------------------------
+# Schema
+# ---------------------------------------------------------------------------
+
+schema = graphene.Schema(query=Query, mutation=Mutation)

api/main.py

@@ -20,7 +20,9 @@ django.setup()
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
+from api.graphql import schema as graphql_schema
 from api.routes import assets_router, jobs_router, presets_router, system_router
+from starlette_graphene3 import GraphQLApp, make_graphiql_handler
 
 app = FastAPI(
     title="MPR API",
@@ -45,6 +47,9 @@ app.include_router(assets_router, prefix="/api")
 app.include_router(presets_router, prefix="/api")
 app.include_router(jobs_router, prefix="/api")
 
+# GraphQL
+app.mount("/graphql", GraphQLApp(schema=graphql_schema, on_get=make_graphiql_handler()))
+
 
 @app.get("/")
 def root():

api/routes/assets.py

@@ -9,45 +9,26 @@ from fastapi import APIRouter, Depends, HTTPException, Query
 
 from api.deps import get_asset
 from api.schemas import AssetCreate, AssetResponse, AssetUpdate
+from core.storage import BUCKET_IN, list_objects
 
 router = APIRouter(prefix="/assets", tags=["assets"])
 
+# Supported media extensions
+VIDEO_EXTS = {".mp4", ".mkv", ".avi", ".mov", ".webm", ".flv", ".wmv", ".m4v"}
+AUDIO_EXTS = {".mp3", ".wav", ".flac", ".aac", ".ogg", ".m4a"}
+MEDIA_EXTS = VIDEO_EXTS | AUDIO_EXTS
+
 
 @router.post("/", response_model=AssetResponse, status_code=201)
 def create_asset(data: AssetCreate):
-    """
+    """Register a media file as an asset."""
-    Register a media file as an asset.
-
-    The file must exist on disk. A probe task will be queued
-    to extract metadata asynchronously.
-    """
-    from pathlib import Path
-
     from mpr.media_assets.models import MediaAsset
 
-    # Validate file exists
-    path = Path(data.file_path)
-    if not path.exists():
-        raise HTTPException(status_code=400, detail="File not found")
-
-    # Store path relative to media root
-    import os
-
-    media_root = Path(os.environ.get("MEDIA_IN", "/app/media/in"))
-    try:
-        rel_path = str(path.relative_to(media_root))
-    except ValueError:
-        rel_path = path.name
-
-    # Create asset
     asset = MediaAsset.objects.create(
-        filename=data.filename or path.name,
+        filename=data.filename or data.file_path.split("/")[-1],
-        file_path=rel_path,
+        file_path=data.file_path,
-        file_size=path.stat().st_size,
+        file_size=data.file_size,
     )
-
-    # TODO: Queue probe task via gRPC/Celery
-
     return asset
 
 
@@ -61,10 +42,8 @@ def list_assets(
     from mpr.media_assets.models import MediaAsset
 
     qs = MediaAsset.objects.all()
-
     if status:
         qs = qs.filter(status=status)
-
     return list(qs[offset : offset + limit])
 
 
@@ -102,62 +81,36 @@ def delete_asset(asset_id: UUID, asset=Depends(get_asset)):
 @router.post("/scan", response_model=dict)
 def scan_media_folder():
     """
-    Scan the media folder for new video/audio files and register them as assets.
+    Scan the S3 media-in bucket for new video/audio files and register them as assets.
-
-    Returns a summary of files found and registered.
     """
-    import os
-    from pathlib import Path
-
     from mpr.media_assets.models import MediaAsset
 
-    # Get media input folder from environment
+    # List objects from S3 bucket
-    media_root = os.environ.get("MEDIA_IN", "/app/media/in")
+    objects = list_objects(BUCKET_IN, extensions=MEDIA_EXTS)
-    media_path = Path(media_root)
-
-    if not media_path.exists():
-        raise HTTPException(
-            status_code=500, detail=f"Media folder not found: {media_root}"
-        )
-
-    # Supported video/audio extensions
-    video_exts = {".mp4", ".mkv", ".avi", ".mov", ".webm", ".flv", ".wmv", ".m4v"}
-    audio_exts = {".mp3", ".wav", ".flac", ".aac", ".ogg", ".m4a"}
-    supported_exts = video_exts | audio_exts
 
     # Get existing filenames to avoid duplicates
     existing_filenames = set(MediaAsset.objects.values_list("filename", flat=True))
 
-    # Scan for media files
-    found_files = []
     registered_files = []
     skipped_files = []
 
-    for file_path in media_path.rglob("*"):
+    for obj in objects:
-        if file_path.is_file() and file_path.suffix.lower() in supported_exts:
+        if obj["filename"] in existing_filenames:
-            found_files.append(str(file_path))
+            skipped_files.append(obj["filename"])
-
-            # Skip if already registered
-            if file_path.name in existing_filenames:
-                skipped_files.append(file_path.name)
             continue
 
-            # Register new asset with path relative to media root
-            rel_path = str(file_path.relative_to(media_path))
         try:
-                asset = MediaAsset.objects.create(
+            MediaAsset.objects.create(
-                    filename=file_path.name,
+                filename=obj["filename"],
-                    file_path=rel_path,
+                file_path=obj["key"],
-                    file_size=file_path.stat().st_size,
+                file_size=obj["size"],
             )
-                registered_files.append(file_path.name)
+            registered_files.append(obj["filename"])
-
-                # TODO: Queue probe task to extract metadata
         except Exception as e:
-                print(f"Error registering {file_path.name}: {e}")
+            print(f"Error registering {obj['filename']}: {e}")
 
     return {
-        "found": len(found_files),
+        "found": len(objects),
         "registered": len(registered_files),
         "skipped": len(skipped_files),
         "files": registered_files,

api/routes/jobs.py

@@ -2,17 +2,20 @@
 Job endpoints - transcode/trim job management.
 """
 
-import json
+import os
+from pathlib import Path
 from typing import Optional
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, HTTPException, Query
+from fastapi import APIRouter, Depends, Header, HTTPException, Query
 
 from api.deps import get_asset, get_job, get_preset
 from api.schemas import JobCreate, JobResponse
 
 router = APIRouter(prefix="/jobs", tags=["jobs"])
 
+CALLBACK_API_KEY = os.environ.get("CALLBACK_API_KEY", "")
+
 
 @router.post("/", response_model=JobResponse, status_code=201)
 def create_job(data: JobCreate):
@@ -36,7 +39,6 @@ def create_job(data: JobCreate):
     if data.preset_id:
         try:
             preset = TranscodePreset.objects.get(id=data.preset_id)
-            # Snapshot preset at job creation time
             preset_snapshot = {
                 "name": preset.name,
                 "container": preset.container,
@@ -61,22 +63,13 @@ def create_job(data: JobCreate):
             status_code=400, detail="Must specify preset_id or trim_start/trim_end"
         )
 
-    # Generate output filename and path
+    # Generate output filename - stored as S3 key in output bucket
-    import os
-    from pathlib import Path
-
     output_filename = data.output_filename
     if not output_filename:
         stem = Path(source.filename).stem
         ext = preset_snapshot.get("container", "mp4") if preset else "mp4"
         output_filename = f"{stem}_output.{ext}"
 
-    media_out = os.environ.get("MEDIA_OUT", "/app/media/out")
-    output_path = str(Path(media_out) / output_filename)
-
-    media_in = os.environ.get("MEDIA_IN", "/app/media/in")
-    source_path = str(Path(media_in) / source.file_path)
-
     # Create job
     job = TranscodeJob.objects.create(
         source_asset_id=source.id,
@@ -85,26 +78,95 @@ def create_job(data: JobCreate):
         trim_start=data.trim_start,
         trim_end=data.trim_end,
         output_filename=output_filename,
-        output_path=output_path,
+        output_path=output_filename,  # S3 key in output bucket
         priority=data.priority or 0,
     )
 
-    # Dispatch to Celery
+    # Dispatch based on executor mode
+    executor_mode = os.environ.get("MPR_EXECUTOR", "local")
+
+    if executor_mode == "lambda":
+        _dispatch_lambda(job, source, preset_snapshot)
+    else:
+        _dispatch_celery(job, source, preset_snapshot)
+
+    return job
+
+
+def _dispatch_celery(job, source, preset_snapshot):
+    """Dispatch job to Celery worker."""
     from task.tasks import run_transcode_job
 
     result = run_transcode_job.delay(
         job_id=str(job.id),
-        source_path=source_path,
+        source_key=source.file_path,
-        output_path=output_path,
+        output_key=job.output_filename,
         preset=preset_snapshot or None,
-        trim_start=data.trim_start,
+        trim_start=job.trim_start,
-        trim_end=data.trim_end,
+        trim_end=job.trim_end,
         duration=source.duration,
     )
     job.celery_task_id = result.id
     job.save(update_fields=["celery_task_id"])
 
-    return job
+
+def _dispatch_lambda(job, source, preset_snapshot):
+    """Dispatch job to AWS Step Functions."""
+    from task.executor import get_executor
+
+    executor = get_executor()
+    executor.run(
+        job_id=str(job.id),
+        source_path=source.file_path,
+        output_path=job.output_filename,
+        preset=preset_snapshot or None,
+        trim_start=job.trim_start,
+        trim_end=job.trim_end,
+        duration=source.duration,
+    )
+
+
+@router.post("/{job_id}/callback")
+def job_callback(
+    job_id: UUID,
+    payload: dict,
+    x_api_key: Optional[str] = Header(None),
+):
+    """
+    Callback endpoint for Lambda to report job completion.
+    Protected by API key.
+    """
+    if CALLBACK_API_KEY and x_api_key != CALLBACK_API_KEY:
+        raise HTTPException(status_code=403, detail="Invalid API key")
+
+    from django.utils import timezone
+
+    from mpr.media_assets.models import TranscodeJob
+
+    try:
+        job = TranscodeJob.objects.get(id=job_id)
+    except TranscodeJob.DoesNotExist:
+        raise HTTPException(status_code=404, detail="Job not found")
+
+    status = payload.get("status", "failed")
+    job.status = status
+    job.progress = 100.0 if status == "completed" else job.progress
+    update_fields = ["status", "progress"]
+
+    if payload.get("error"):
+        job.error_message = payload["error"]
+        update_fields.append("error_message")
+
+    if status == "completed":
+        job.completed_at = timezone.now()
+        update_fields.append("completed_at")
+    elif status == "failed":
+        job.completed_at = timezone.now()
+        update_fields.append("completed_at")
+
+    job.save(update_fields=update_fields)
+
+    return {"ok": True}
 
 
 @router.get("/", response_model=list[JobResponse])
@@ -118,12 +180,10 @@ def list_jobs(
     from mpr.media_assets.models import TranscodeJob
 
     qs = TranscodeJob.objects.all()
-
     if status:
         qs = qs.filter(status=status)
     if source_asset_id:
         qs = qs.filter(source_asset_id=source_asset_id)
-
     return list(qs[offset : offset + limit])
 
 
@@ -154,11 +214,8 @@ def cancel_job(job_id: UUID, job=Depends(get_job)):
             status_code=400, detail=f"Cannot cancel job with status: {job.status}"
         )
 
-    # TODO: Cancel via gRPC
-
     job.status = "cancelled"
     job.save(update_fields=["status"])
-
     return job
 
 
@@ -173,6 +230,4 @@ def retry_job(job_id: UUID, job=Depends(get_job)):
     job.error_message = None
     job.save(update_fields=["status", "progress", "error_message"])
 
-    # TODO: Resubmit via gRPC
-
     return job

api/schemas/graphql_types.py

@@ -0,0 +1,129 @@
+"""
+Graphene Types - GENERATED FILE
+
+Do not edit directly. Regenerate using modelgen.
+"""
+
+import graphene
+
+
+class AssetStatus(graphene.Enum):
+    PENDING = "pending"
+    READY = "ready"
+    ERROR = "error"
+
+
+class JobStatus(graphene.Enum):
+    PENDING = "pending"
+    PROCESSING = "processing"
+    COMPLETED = "completed"
+    FAILED = "failed"
+    CANCELLED = "cancelled"
+
+
+class MediaAssetType(graphene.ObjectType):
+    """A video/audio file registered in the system."""
+
+    id = graphene.UUID()
+    filename = graphene.String()
+    file_path = graphene.String()
+    status = graphene.String()
+    error_message = graphene.String()
+    file_size = graphene.Int()
+    duration = graphene.Float()
+    video_codec = graphene.String()
+    audio_codec = graphene.String()
+    width = graphene.Int()
+    height = graphene.Int()
+    framerate = graphene.Float()
+    bitrate = graphene.Int()
+    properties = graphene.JSONString()
+    comments = graphene.String()
+    tags = graphene.List(graphene.String)
+    created_at = graphene.DateTime()
+    updated_at = graphene.DateTime()
+
+
+class TranscodePresetType(graphene.ObjectType):
+    """A reusable transcoding configuration (like Handbrake presets)."""
+
+    id = graphene.UUID()
+    name = graphene.String()
+    description = graphene.String()
+    is_builtin = graphene.Boolean()
+    container = graphene.String()
+    video_codec = graphene.String()
+    video_bitrate = graphene.String()
+    video_crf = graphene.Int()
+    video_preset = graphene.String()
+    resolution = graphene.String()
+    framerate = graphene.Float()
+    audio_codec = graphene.String()
+    audio_bitrate = graphene.String()
+    audio_channels = graphene.Int()
+    audio_samplerate = graphene.Int()
+    extra_args = graphene.List(graphene.String)
+    created_at = graphene.DateTime()
+    updated_at = graphene.DateTime()
+
+
+class TranscodeJobType(graphene.ObjectType):
+    """A transcoding or trimming job in the queue."""
+
+    id = graphene.UUID()
+    source_asset_id = graphene.UUID()
+    preset_id = graphene.UUID()
+    preset_snapshot = graphene.JSONString()
+    trim_start = graphene.Float()
+    trim_end = graphene.Float()
+    output_filename = graphene.String()
+    output_path = graphene.String()
+    output_asset_id = graphene.UUID()
+    status = graphene.String()
+    progress = graphene.Float()
+    current_frame = graphene.Int()
+    current_time = graphene.Float()
+    speed = graphene.String()
+    error_message = graphene.String()
+    celery_task_id = graphene.String()
+    execution_arn = graphene.String()
+    priority = graphene.Int()
+    created_at = graphene.DateTime()
+    started_at = graphene.DateTime()
+    completed_at = graphene.DateTime()
+
+
+class CreateJobInput(graphene.InputObjectType):
+    """Request body for creating a transcode/trim job."""
+
+    source_asset_id = graphene.UUID(required=True)
+    preset_id = graphene.UUID()
+    trim_start = graphene.Float()
+    trim_end = graphene.Float()
+    output_filename = graphene.String()
+    priority = graphene.Int(default_value=0)
+
+
+class SystemStatusType(graphene.ObjectType):
+    """System status response."""
+
+    status = graphene.String()
+    version = graphene.String()
+
+
+class ScanResultType(graphene.ObjectType):
+    """Result of scanning the media input bucket."""
+
+    found = graphene.Int()
+    registered = graphene.Int()
+    skipped = graphene.Int()
+    files = graphene.List(graphene.String)
+
+
+class WorkerStatusType(graphene.ObjectType):
+    """Worker health and capabilities."""
+
+    available = graphene.Boolean()
+    active_jobs = graphene.Int()
+    supported_codecs = graphene.List(graphene.String)
+    gpu_available = graphene.Boolean()

api/schemas/models.py

@@ -83,6 +83,7 @@ class TranscodeJob(BaseModel):
     speed: Optional[str] = None
     error_message: Optional[str] = None
     celery_task_id: Optional[str] = None
+    execution_arn: Optional[str] = None
     priority: int = 0
     created_at: Optional[datetime] = None
     started_at: Optional[datetime] = None

core/storage.py

@@ -0,0 +1,90 @@
+"""
+S3 storage layer.
+
+Uses MinIO locally (S3-compatible) and real AWS S3 in production.
+The only difference is S3_ENDPOINT_URL: set for MinIO, omit for AWS.
+"""
+
+import os
+import tempfile
+from pathlib import Path
+from typing import Optional
+
+import boto3
+from botocore.config import Config
+
+BUCKET_IN = os.environ.get("S3_BUCKET_IN", "mpr-media-in")
+BUCKET_OUT = os.environ.get("S3_BUCKET_OUT", "mpr-media-out")
+
+
+def get_s3_client():
+    """Get a boto3 S3 client. Works with both MinIO and real AWS S3."""
+    kwargs = {
+        "region_name": os.environ.get("AWS_REGION", "us-east-1"),
+        "config": Config(signature_version="s3v4"),
+    }
+    endpoint = os.environ.get("S3_ENDPOINT_URL")
+    if endpoint:
+        kwargs["endpoint_url"] = endpoint
+        kwargs["aws_access_key_id"] = os.environ.get("AWS_ACCESS_KEY_ID", "minioadmin")
+        kwargs["aws_secret_access_key"] = os.environ.get("AWS_SECRET_ACCESS_KEY", "minioadmin")
+    return boto3.client("s3", **kwargs)
+
+
+def list_objects(bucket: str, prefix: str = "", extensions: Optional[set] = None) -> list[dict]:
+    """List objects in an S3 bucket, optionally filtered by file extension."""
+    s3 = get_s3_client()
+    objects = []
+    kwargs = {"Bucket": bucket, "Prefix": prefix}
+
+    while True:
+        response = s3.list_objects_v2(**kwargs)
+        for obj in response.get("Contents", []):
+            key = obj["Key"]
+            if extensions:
+                ext = Path(key).suffix.lower()
+                if ext not in extensions:
+                    continue
+            objects.append({
+                "key": key,
+                "size": obj["Size"],
+                "filename": Path(key).name,
+            })
+        if not response.get("IsTruncated"):
+            break
+        kwargs["ContinuationToken"] = response["NextContinuationToken"]
+
+    return objects
+
+
+def download_file(bucket: str, key: str, local_path: str) -> str:
+    """Download a file from S3 to a local path."""
+    s3 = get_s3_client()
+    Path(local_path).parent.mkdir(parents=True, exist_ok=True)
+    s3.download_file(bucket, key, local_path)
+    return local_path
+
+
+def download_to_temp(bucket: str, key: str) -> str:
+    """Download a file from S3 to a temp file. Caller must clean up."""
+    ext = Path(key).suffix
+    fd, tmp_path = tempfile.mkstemp(suffix=ext)
+    os.close(fd)
+    download_file(bucket, key, tmp_path)
+    return tmp_path
+
+
+def upload_file(local_path: str, bucket: str, key: str) -> None:
+    """Upload a local file to S3."""
+    s3 = get_s3_client()
+    s3.upload_file(local_path, bucket, key)
+
+
+def get_presigned_url(bucket: str, key: str, expires: int = 3600) -> str:
+    """Generate a presigned URL for an S3 object."""
+    s3 = get_s3_client()
+    return s3.generate_presigned_url(
+        "get_object",
+        Params={"Bucket": bucket, "Key": key},
+        ExpiresIn=expires,
+    )

ctrl/.env.template

@@ -27,9 +27,13 @@ GRPC_HOST=grpc
 GRPC_PORT=50051
 GRPC_MAX_WORKERS=10
 
-# Media
+# S3 Storage (MinIO locally, real S3 on AWS)
-MEDIA_IN=/app/media/in
+S3_ENDPOINT_URL=http://minio:9000
-MEDIA_OUT=/app/media/out
+S3_BUCKET_IN=mpr-media-in
+S3_BUCKET_OUT=mpr-media-out
+AWS_REGION=us-east-1
+AWS_ACCESS_KEY_ID=minioadmin
+AWS_SECRET_ACCESS_KEY=minioadmin
 
 # Vite
 VITE_ALLOWED_HOSTS=your-domain.local

ctrl/deploy.sh

@@ -1,18 +1,17 @@
 #!/bin/bash
-# Deploy MPR to remote server via rsync
+# MPR Deploy Script
-# Uses project .gitignore for excludes
 #
-# Usage: ./ctrl/deploy.sh [--restart] [--dry-run]
+# Usage: ./ctrl/deploy.sh <command> [options]
 #
-# Examples:
+# Commands:
-#   ./ctrl/deploy.sh              # Sync files only
+#   rsync [--restart] [--dry-run]   Sync to remote server via rsync
-#   ./ctrl/deploy.sh --restart    # Sync and restart services
+#   aws                             Deploy AWS infrastructure (Lambda, Step Functions, S3)
-#   ./ctrl/deploy.sh --dry-run    # Preview sync
 
-set -e
+set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+cd "$PROJECT_ROOT"
 
 source "$SCRIPT_DIR/.env" 2>/dev/null || true
 
@@ -21,7 +20,10 @@ GREEN='\033[0;32m'
 YELLOW='\033[1;33m'
 NC='\033[0m'
 
-if [ -z "$SERVER" ] || [ -z "$REMOTE_PATH" ]; then
+# ─── Rsync Deploy ─────────────────────────────────────────────────────────────
+
+deploy_rsync() {
+    if [ -z "${SERVER:-}" ] || [ -z "${REMOTE_PATH:-}" ]; then
         echo -e "${RED}Error: SERVER and REMOTE_PATH must be set in ctrl/.env${NC}"
         echo "Example:"
         echo "  SERVER=user@host"
@@ -34,24 +36,14 @@ DRY_RUN=""
 
     while [ $# -gt 0 ]; do
         case "$1" in
-        --restart)
+            --restart) RESTART=true; shift ;;
-            RESTART=true
+            --dry-run) DRY_RUN="--dry-run"; shift ;;
-            shift
+            *) echo "Unknown option: $1"; exit 1 ;;
-            ;;
-        --dry-run)
-            DRY_RUN="--dry-run"
-            shift
-            ;;
-        *)
-            echo "Unknown option: $1"
-            exit 1
-            ;;
         esac
     done
 
     echo -e "${GREEN}=== Deploying MPR to $SERVER:$REMOTE_PATH ===${NC}"
 
-# Sync files using .gitignore for excludes
     echo -e "${YELLOW}Syncing files...${NC}"
     rsync -avz --delete $DRY_RUN \
         --filter=':- .gitignore' \
@@ -65,7 +57,6 @@ if [ -n "$DRY_RUN" ]; then
         exit 0
     fi
 
-# Copy env template if .env doesn't exist on remote
     ssh "$SERVER" "[ -f $REMOTE_PATH/ctrl/.env ] || cp $REMOTE_PATH/ctrl/.env.template $REMOTE_PATH/ctrl/.env"
 
     if [ "$RESTART" = true ]; then
@@ -74,3 +65,223 @@ if [ "$RESTART" = true ]; then
     fi
 
     echo -e "${GREEN}Done!${NC}"
+}
+
+# ─── AWS Deploy ────────────────────────────────────────────────────────────────
+
+deploy_aws() {
+    REGION="${AWS_REGION:-us-east-1}"
+    ACCOUNT_ID=$(aws sts get-caller-identity --query Account --output text)
+    PROJECT="mpr"
+
+    # S3
+    BUCKET_IN="${S3_BUCKET_IN:-mpr-media-in}"
+    BUCKET_OUT="${S3_BUCKET_OUT:-mpr-media-out}"
+
+    # ECR
+    ECR_REPO="${PROJECT}-transcode"
+    ECR_URI="${ACCOUNT_ID}.dkr.ecr.${REGION}.amazonaws.com/${ECR_REPO}"
+
+    # Lambda
+    LAMBDA_NAME="${PROJECT}-transcode"
+    LAMBDA_TIMEOUT=900
+    LAMBDA_MEMORY=2048
+
+    # Step Functions
+    SFN_NAME="${PROJECT}-transcode"
+
+    # IAM
+    LAMBDA_ROLE_NAME="${PROJECT}-lambda-role"
+    SFN_ROLE_NAME="${PROJECT}-sfn-role"
+
+    # Callback
+    CALLBACK_URL="${CALLBACK_URL:-https://mpr.mcrn.ar/api}"
+    CALLBACK_API_KEY="${CALLBACK_API_KEY:-changeme}"
+
+    echo -e "${GREEN}=== Deploying MPR to AWS ($REGION, account $ACCOUNT_ID) ===${NC}"
+
+    # ─── S3 Buckets ───────────────────────────────────────────────────────
+
+    echo -e "${YELLOW}Creating S3 buckets...${NC}"
+    for bucket in "$BUCKET_IN" "$BUCKET_OUT"; do
+        if ! aws s3api head-bucket --bucket "$bucket" 2>/dev/null; then
+            aws s3api create-bucket \
+                --bucket "$bucket" \
+                --region "$REGION" \
+                --create-bucket-configuration LocationConstraint="$REGION"
+            echo "  Created $bucket"
+        else
+            echo "  $bucket already exists"
+        fi
+    done
+
+    # ─── IAM Roles ────────────────────────────────────────────────────────
+
+    echo -e "${YELLOW}Creating IAM roles...${NC}"
+
+    if ! aws iam get-role --role-name "$LAMBDA_ROLE_NAME" 2>/dev/null; then
+        aws iam create-role \
+            --role-name "$LAMBDA_ROLE_NAME" \
+            --assume-role-policy-document '{
+                "Version": "2012-10-17",
+                "Statement": [{
+                    "Effect": "Allow",
+                    "Principal": {"Service": "lambda.amazonaws.com"},
+                    "Action": "sts:AssumeRole"
+                }]
+            }'
+        aws iam attach-role-policy \
+            --role-name "$LAMBDA_ROLE_NAME" \
+            --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
+        aws iam put-role-policy \
+            --role-name "$LAMBDA_ROLE_NAME" \
+            --policy-name "${PROJECT}-s3-access" \
+            --policy-document '{
+                "Version": "2012-10-17",
+                "Statement": [{
+                    "Effect": "Allow",
+                    "Action": ["s3:GetObject", "s3:PutObject"],
+                    "Resource": [
+                        "arn:aws:s3:::'"$BUCKET_IN"'/*",
+                        "arn:aws:s3:::'"$BUCKET_OUT"'/*"
+                    ]
+                }]
+            }'
+        echo "  Created $LAMBDA_ROLE_NAME"
+        echo "  Waiting for role to propagate..."
+        sleep 10
+    else
+        echo "  $LAMBDA_ROLE_NAME already exists"
+    fi
+    LAMBDA_ROLE_ARN=$(aws iam get-role --role-name "$LAMBDA_ROLE_NAME" --query Role.Arn --output text)
+
+    if ! aws iam get-role --role-name "$SFN_ROLE_NAME" 2>/dev/null; then
+        aws iam create-role \
+            --role-name "$SFN_ROLE_NAME" \
+            --assume-role-policy-document '{
+                "Version": "2012-10-17",
+                "Statement": [{
+                    "Effect": "Allow",
+                    "Principal": {"Service": "states.amazonaws.com"},
+                    "Action": "sts:AssumeRole"
+                }]
+            }'
+        aws iam put-role-policy \
+            --role-name "$SFN_ROLE_NAME" \
+            --policy-name "${PROJECT}-sfn-invoke-lambda" \
+            --policy-document '{
+                "Version": "2012-10-17",
+                "Statement": [{
+                    "Effect": "Allow",
+                    "Action": "lambda:InvokeFunction",
+                    "Resource": "arn:aws:lambda:'"$REGION"':'"$ACCOUNT_ID"':function:'"$LAMBDA_NAME"'"
+                }]
+            }'
+        echo "  Created $SFN_ROLE_NAME"
+        sleep 10
+    else
+        echo "  $SFN_ROLE_NAME already exists"
+    fi
+    SFN_ROLE_ARN=$(aws iam get-role --role-name "$SFN_ROLE_NAME" --query Role.Arn --output text)
+
+    # ─── ECR Repository ──────────────────────────────────────────────────
+
+    echo -e "${YELLOW}Setting up ECR...${NC}"
+    if ! aws ecr describe-repositories --repository-names "$ECR_REPO" --region "$REGION" 2>/dev/null; then
+        aws ecr create-repository --repository-name "$ECR_REPO" --region "$REGION"
+        echo "  Created ECR repo $ECR_REPO"
+    else
+        echo "  ECR repo $ECR_REPO already exists"
+    fi
+
+    # ─── Build & Push Lambda Image ───────────────────────────────────────
+
+    echo -e "${YELLOW}Building Lambda container image...${NC}"
+
+    docker build -f ctrl/lambda/Dockerfile -t "${ECR_REPO}:latest" .
+
+    echo -e "${YELLOW}Pushing to ECR...${NC}"
+    aws ecr get-login-password --region "$REGION" | \
+        docker login --username AWS --password-stdin "${ACCOUNT_ID}.dkr.ecr.${REGION}.amazonaws.com"
+
+    docker tag "${ECR_REPO}:latest" "${ECR_URI}:latest"
+    docker push "${ECR_URI}:latest"
+
+    # ─── Lambda Function ─────────────────────────────────────────────────
+
+    echo -e "${YELLOW}Deploying Lambda function...${NC}"
+    LAMBDA_ARN="arn:aws:lambda:${REGION}:${ACCOUNT_ID}:function:${LAMBDA_NAME}"
+
+    if aws lambda get-function --function-name "$LAMBDA_NAME" --region "$REGION" 2>/dev/null; then
+        aws lambda update-function-code \
+            --function-name "$LAMBDA_NAME" \
+            --image-uri "${ECR_URI}:latest" \
+            --region "$REGION"
+        echo "  Updated $LAMBDA_NAME"
+    else
+        aws lambda create-function \
+            --function-name "$LAMBDA_NAME" \
+            --package-type Image \
+            --code ImageUri="${ECR_URI}:latest" \
+            --role "$LAMBDA_ROLE_ARN" \
+            --timeout "$LAMBDA_TIMEOUT" \
+            --memory-size "$LAMBDA_MEMORY" \
+            --environment "Variables={S3_BUCKET_IN=${BUCKET_IN},S3_BUCKET_OUT=${BUCKET_OUT},AWS_REGION=${REGION}}" \
+            --region "$REGION"
+        echo "  Created $LAMBDA_NAME"
+    fi
+
+    # ─── Step Functions ───────────────────────────────────────────────────
+
+    echo -e "${YELLOW}Deploying Step Functions state machine...${NC}"
+
+    SFN_DEFINITION=$(sed "s|\${TranscodeLambdaArn}|${LAMBDA_ARN}|g" ctrl/state-machine.json)
+
+    SFN_ARN="arn:aws:states:${REGION}:${ACCOUNT_ID}:stateMachine:${SFN_NAME}"
+    if aws stepfunctions describe-state-machine --state-machine-arn "$SFN_ARN" --region "$REGION" 2>/dev/null; then
+        aws stepfunctions update-state-machine \
+            --state-machine-arn "$SFN_ARN" \
+            --definition "$SFN_DEFINITION" \
+            --region "$REGION"
+        echo "  Updated $SFN_NAME"
+    else
+        aws stepfunctions create-state-machine \
+            --name "$SFN_NAME" \
+            --definition "$SFN_DEFINITION" \
+            --role-arn "$SFN_ROLE_ARN" \
+            --region "$REGION"
+        echo "  Created $SFN_NAME"
+    fi
+
+    # ─── Summary ──────────────────────────────────────────────────────────
+
+    echo ""
+    echo -e "${GREEN}Deployment complete!${NC}"
+    echo ""
+    echo "Add these to your .env:"
+    echo "  MPR_EXECUTOR=lambda"
+    echo "  STEP_FUNCTION_ARN=${SFN_ARN}"
+    echo "  LAMBDA_FUNCTION_ARN=${LAMBDA_ARN}"
+    echo "  S3_BUCKET_IN=${BUCKET_IN}"
+    echo "  S3_BUCKET_OUT=${BUCKET_OUT}"
+    echo "  CALLBACK_URL=${CALLBACK_URL}"
+    echo "  CALLBACK_API_KEY=${CALLBACK_API_KEY}"
+}
+
+# ─── Main ──────────────────────────────────────────────────────────────────────
+
+COMMAND="${1:-}"
+shift || true
+
+case "$COMMAND" in
+    rsync) deploy_rsync "$@" ;;
+    aws)   deploy_aws "$@" ;;
+    *)
+        echo "Usage: ./ctrl/deploy.sh <command> [options]"
+        echo ""
+        echo "Commands:"
+        echo "  rsync [--restart] [--dry-run]   Sync to remote server"
+        echo "  aws                             Deploy AWS infrastructure"
+        exit 1
+        ;;
+esac

ctrl/docker-compose.yml

@@ -5,8 +5,12 @@ x-common-env: &common-env
   DEBUG: 1
   GRPC_HOST: grpc
   GRPC_PORT: 50051
-  MEDIA_IN: ${MEDIA_IN:-/app/media/in}
+  S3_ENDPOINT_URL: http://minio:9000
-  MEDIA_OUT: ${MEDIA_OUT:-/app/media/out}
+  S3_BUCKET_IN: mpr-media-in
+  S3_BUCKET_OUT: mpr-media-out
+  AWS_ACCESS_KEY_ID: minioadmin
+  AWS_SECRET_ACCESS_KEY: minioadmin
+  AWS_REGION: us-east-1
 
 x-healthcheck-defaults: &healthcheck-defaults
   interval: 5s
@@ -42,17 +46,46 @@ services:
       <<: *healthcheck-defaults
       test: ["CMD", "redis-cli", "ping"]
 
+  minio:
+    image: minio/minio
+    command: ["server", "/data", "--console-address", ":9001"]
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    environment:
+      MINIO_ROOT_USER: minioadmin
+      MINIO_ROOT_PASSWORD: minioadmin
+    volumes:
+      - minio-data:/data
+    healthcheck:
+      <<: *healthcheck-defaults
+      test: ["CMD", "mc", "ready", "local"]
+
+  minio-init:
+    image: minio/mc
+    depends_on:
+      minio:
+        condition: service_healthy
+    entrypoint: ["/bin/sh", "-c"]
+    command:
+      - |
+        mc alias set local http://minio:9000 minioadmin minioadmin
+        mc mb --ignore-existing local/mpr-media-in
+        mc mb --ignore-existing local/mpr-media-out
+        mc anonymous set download local/mpr-media-in
+        mc anonymous set download local/mpr-media-out
+
   nginx:
     image: nginx:alpine
     ports:
       - "80:80"
     volumes:
       - ./nginx.conf:/etc/nginx/nginx.conf:ro
-      - ../media:/app/media:ro
     depends_on:
       - django
       - fastapi
       - timeline
+      - minio
 
   # =============================================================================
   # Application Services
@@ -72,7 +105,6 @@ services:
       <<: *common-env
     volumes:
       - ..:/app
-      - ../media:/app/media
     depends_on:
       postgres:
         condition: service_healthy
@@ -90,7 +122,6 @@ services:
       <<: *common-env
     volumes:
       - ..:/app
-      - ../media:/app/media
     depends_on:
       postgres:
         condition: service_healthy
@@ -110,7 +141,6 @@ services:
       GRPC_MAX_WORKERS: 10
     volumes:
       - ..:/app
-      - ../media:/app/media
     depends_on:
       postgres:
         condition: service_healthy
@@ -127,7 +157,6 @@ services:
       MPR_EXECUTOR: local
     volumes:
       - ..:/app
-      - ../media:/app/media
     depends_on:
       postgres:
         condition: service_healthy
@@ -150,6 +179,7 @@ services:
 volumes:
   postgres-data:
   redis-data:
+  minio-data:
 
 networks:
   default:

ctrl/generate.sh

@@ -29,6 +29,13 @@ python -m modelgen from-schema \
     --targets typescript \
     --include dataclasses,enums,api
 
+# Graphene types for GraphQL: domain models + enums + API types
+python -m modelgen from-schema \
+    --schema schema/models \
+    --output api/schemas/graphql_types.py \
+    --targets graphene \
+    --include dataclasses,enums,api
+
 # Protobuf for gRPC: gRPC messages + service
 python -m modelgen from-schema \
     --schema schema/models \

ctrl/lambda/Dockerfile

@@ -0,0 +1,21 @@
+FROM public.ecr.aws/lambda/python:3.11
+
+# Install ffmpeg static binary
+RUN yum install -y tar xz && \
+    curl -L https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz -o /tmp/ffmpeg.tar.xz && \
+    tar -xf /tmp/ffmpeg.tar.xz -C /tmp && \
+    cp /tmp/ffmpeg-*-amd64-static/ffmpeg /usr/local/bin/ffmpeg && \
+    cp /tmp/ffmpeg-*-amd64-static/ffprobe /usr/local/bin/ffprobe && \
+    rm -rf /tmp/ffmpeg* && \
+    yum clean all
+
+# Install Python dependencies
+COPY ctrl/lambda/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY task/lambda_handler.py ${LAMBDA_TASK_ROOT}/task/lambda_handler.py
+COPY task/__init__.py ${LAMBDA_TASK_ROOT}/task/__init__.py
+COPY core/ ${LAMBDA_TASK_ROOT}/core/
+
+CMD ["task.lambda_handler.handler"]

ctrl/lambda/requirements.txt

@@ -0,0 +1,2 @@
+ffmpeg-python>=0.2.0
+requests>=2.31.0

ctrl/nginx.conf

@@ -21,6 +21,10 @@ http {
         server timeline:5173;
     }
 
+    upstream minio {
+        server minio:9000;
+    }
+
     server {
         listen 80;
         server_name mpr.local.ar;
@@ -67,16 +71,15 @@ http {
             proxy_set_header Host $host;
         }
 
-        # Media files - input (source)
+        # Media files - proxied from MinIO (local) or S3 (AWS)
-        location /media/in {
+        location /media/in/ {
-            alias /app/media/in;
+            proxy_pass http://minio/mpr-media-in/;
-            autoindex on;
+            proxy_set_header Host $http_host;
         }
 
-        # Media files - output (transcoded)
+        location /media/out/ {
-        location /media/out {
+            proxy_pass http://minio/mpr-media-out/;
-            alias /app/media/out;
+            proxy_set_header Host $http_host;
-            autoindex on;
         }
 
         # Default to Timeline UI

ctrl/state-machine.json

@@ -0,0 +1,39 @@
+{
+  "Comment": "MPR Transcode Job - orchestrates Lambda-based media transcoding",
+  "StartAt": "Transcode",
+  "States": {
+    "Transcode": {
+      "Type": "Task",
+      "Resource": "${TranscodeLambdaArn}",
+      "TimeoutSeconds": 900,
+      "Retry": [
+        {
+          "ErrorEquals": ["States.TaskFailed", "Lambda.ServiceException"],
+          "IntervalSeconds": 10,
+          "MaxAttempts": 2,
+          "BackoffRate": 2.0
+        }
+      ],
+      "Catch": [
+        {
+          "ErrorEquals": ["States.ALL"],
+          "Next": "HandleError",
+          "ResultPath": "$.error"
+        }
+      ],
+      "Next": "Done"
+    },
+    "HandleError": {
+      "Type": "Pass",
+      "Parameters": {
+        "status": "failed",
+        "job_id.$": "$.job_id",
+        "error.$": "$.error.Cause"
+      },
+      "Next": "Done"
+    },
+    "Done": {
+      "Type": "Succeed"
+    }
+  }
+}

docs/architecture/01-system-overview.dot

@@ -3,13 +3,11 @@ digraph system_overview {
     node [shape=box, style=rounded, fontname="Helvetica"]
     edge [fontname="Helvetica", fontsize=10]
 
-    // Title
     labelloc="t"
     label="MPR - System Overview"
     fontsize=16
     fontname="Helvetica-Bold"
 
-    // Styling
     graph [splines=ortho, nodesep=0.8, ranksep=0.8]
 
     // External
@@ -18,7 +16,7 @@ digraph system_overview {
         style=dashed
         color=gray
 
-        browser [label="Browser\nmpr.local.ar", shape=ellipse]
+        browser [label="Browser\nmpr.local.ar / mpr.mcrn.ar", shape=ellipse]
     }
 
     // Nginx reverse proxy
@@ -37,7 +35,7 @@ digraph system_overview {
         fillcolor="#f0f8e8"
 
         django [label="Django\n/admin\nport 8701"]
-        fastapi [label="FastAPI\n/api\nport 8702"]
+        fastapi [label="FastAPI\n/api + /graphql\nport 8702"]
         timeline [label="Timeline UI\n/ui\nport 5173"]
     }
 
@@ -48,8 +46,17 @@ digraph system_overview {
         fillcolor="#fff8e8"
 
         grpc_server [label="gRPC Server\nport 50051"]
-        celery [label="Celery Worker\n(local)"]
+        celery [label="Celery Worker\n(local mode)"]
-        lambda [label="Lambda\n(cloud)", style="dashed,rounded"]
+    }
+
+    // AWS layer
+    subgraph cluster_aws {
+        label="AWS (lambda mode)"
+        style=filled
+        fillcolor="#fde8d0"
+
+        step_functions [label="Step Functions\nstate machine"]
+        lambda [label="Lambda\nFFmpeg container"]
     }
 
     // Data layer
@@ -58,48 +65,50 @@ digraph system_overview {
         style=filled
         fillcolor="#f8e8f0"
 
-        postgres [label="PostgreSQL\nport 5433", shape=cylinder]
+        postgres [label="PostgreSQL\nport 5436", shape=cylinder]
-        redis [label="Redis\nport 6380", shape=cylinder]
+        redis [label="Redis\nport 6381", shape=cylinder]
-        sqs [label="SQS\n(cloud)", shape=cylinder, style=dashed]
     }
 
     // Storage
     subgraph cluster_storage {
-        label="File Storage"
+        label="S3 Storage"
         style=filled
         fillcolor="#f0f0f0"
 
-        local_fs [label="Local FS\n/media", shape=folder]
+        minio [label="MinIO (local)\nport 9000", shape=folder]
-        s3 [label="S3\n(cloud)", shape=folder, style=dashed]
+        s3 [label="AWS S3 (cloud)", shape=folder, style="dashed,rounded"]
+        bucket_in [label="mpr-media-in", shape=note]
+        bucket_out [label="mpr-media-out", shape=note]
     }
 
     // Connections
     browser -> nginx
 
-    nginx -> django [label="/admin"]
+    nginx -> django [xlabel="/admin"]
-    nginx -> fastapi [label="/api"]
+    nginx -> fastapi [xlabel="/api, /graphql"]
-    nginx -> timeline [label="/ui"]
+    nginx -> timeline [xlabel="/ui"]
+    nginx -> minio [xlabel="/media/*"]
 
-    // Django uses FastAPI for operations (single API gateway)
+    timeline -> fastapi [xlabel="REST API"]
-    django -> fastapi [label="job operations"]
-    django -> postgres [label="CRUD only"]
 
-    // Timeline UI uses FastAPI
-    timeline -> fastapi [label="REST API"]
-
-    // FastAPI is the single API gateway
     fastapi -> postgres
-    fastapi -> redis [label="job status"]
+    fastapi -> grpc_server [xlabel="gRPC\nprogress"]
-    fastapi -> grpc_server [label="gRPC\nprogress streaming"]
 
-    // Worker layer
+    // Local mode
-    grpc_server -> celery [label="task dispatch"]
+    grpc_server -> celery [xlabel="task dispatch"]
-    celery -> redis [label="queue"]
+    celery -> redis [xlabel="queue"]
-    celery -> postgres [label="job updates"]
+    celery -> postgres [xlabel="job updates"]
-    celery -> grpc_server [label="progress\ncallbacks", style=dotted]
+    celery -> minio [xlabel="S3 API\ndownload/upload"]
-    celery -> local_fs [label="read/write"]
 
-    // Cloud (future)
+    // Lambda mode
-    lambda -> sqs [label="queue", style=dashed]
+    fastapi -> step_functions [xlabel="boto3\nstart_execution", style=dashed]
-    lambda -> s3 [label="read/write", style=dashed]
+    step_functions -> lambda [style=dashed]
+    lambda -> s3 [xlabel="download/upload", style=dashed]
+    lambda -> fastapi [xlabel="callback\nPOST /jobs/{id}/callback", style=dashed]
+
+    // Storage details
+    minio -> bucket_in [style=dotted, arrowhead=none]
+    minio -> bucket_out [style=dotted, arrowhead=none]
+    s3 -> bucket_in [style=dotted, arrowhead=none]
+    s3 -> bucket_out [style=dotted, arrowhead=none]
 }

docs/architecture/01-system-overview.svg

@@ -1,260 +1,293 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<!-- Generated by graphviz version 14.1.1 (0)
+<!-- Generated by graphviz version 14.1.2 (0)
  -->
 <!-- Title: system_overview Pages: 1 -->
-<svg width="843pt" height="957pt"
+<svg width="620pt" height="903pt"
- viewBox="0.00 0.00 843.00 957.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+ viewBox="0.00 0.00 620.00 903.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 952.79)">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 898.54)">
 <title>system_overview</title>
-<polygon fill="white" stroke="none" points="-4,4 -4,-952.79 838.5,-952.79 838.5,4 -4,4"/>
+<polygon fill="white" stroke="none" points="-4,4 -4,-898.54 616,-898.54 616,4 -4,4"/>
-<text xml:space="preserve" text-anchor="middle" x="417.25" y="-929.59" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">MPR &#45; System Overview</text>
+<text xml:space="preserve" text-anchor="middle" x="306" y="-875.34" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">MPR &#45; System Overview</text>
 <g id="clust1" class="cluster">
 <title>cluster_external</title>
-<polygon fill="none" stroke="gray" stroke-dasharray="5,2" points="478,-809.69 478,-913.29 632,-913.29 632,-809.69 478,-809.69"/>
+<polygon fill="none" stroke="gray" stroke-dasharray="5,2" points="246,-755.44 246,-859.04 540,-859.04 540,-755.44 246,-755.44"/>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-894.09" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">External</text>
+<text xml:space="preserve" text-anchor="middle" x="393" y="-839.84" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">External</text>
 </g>
 <g id="clust2" class="cluster">
 <title>cluster_proxy</title>
-<polygon fill="#e8f4f8" stroke="black" points="482,-693.69 482,-779.69 628,-779.69 628,-693.69 482,-693.69"/>
+<polygon fill="#e8f4f8" stroke="black" points="320,-654.94 320,-740.94 466,-740.94 466,-654.94 320,-654.94"/>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-760.49" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Reverse Proxy</text>
+<text xml:space="preserve" text-anchor="middle" x="393" y="-721.74" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Reverse Proxy</text>
 </g>
 <g id="clust3" class="cluster">
 <title>cluster_apps</title>
-<polygon fill="#f0f8e8" stroke="black" points="352,-418.19 352,-651.94 606,-651.94 606,-418.19 352,-418.19"/>
+<polygon fill="#f0f8e8" stroke="black" points="278,-419.44 278,-640.44 532,-640.44 532,-419.44 278,-419.44"/>
-<text xml:space="preserve" text-anchor="middle" x="479" y="-632.74" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Application Layer</text>
+<text xml:space="preserve" text-anchor="middle" x="405" y="-621.24" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Application Layer</text>
 </g>
 <g id="clust4" class="cluster">
 <title>cluster_workers</title>
-<polygon fill="#fff8e8" stroke="black" points="125,-151.69 125,-363.69 374,-363.69 374,-151.69 125,-151.69"/>
+<polygon fill="#fff8e8" stroke="black" points="142,-218.44 142,-404.94 280,-404.94 280,-218.44 142,-218.44"/>
-<text xml:space="preserve" text-anchor="middle" x="249.5" y="-344.49" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Worker Layer</text>
+<text xml:space="preserve" text-anchor="middle" x="211" y="-385.74" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Worker Layer</text>
 </g>
 <g id="clust5" class="cluster">
-<title>cluster_data</title>
+<title>cluster_aws</title>
-<polygon fill="#f8e8f0" stroke="black" points="322,-8 322,-109.94 700,-109.94 700,-8 322,-8"/>
+<polygon fill="#fde8d0" stroke="black" points="383,-218.44 383,-404.94 581,-404.94 581,-218.44 383,-218.44"/>
-<text xml:space="preserve" text-anchor="middle" x="511" y="-90.74" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Data Layer</text>
+<text xml:space="preserve" text-anchor="middle" x="482" y="-385.74" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">AWS (lambda mode)</text>
 </g>
 <g id="clust6" class="cluster">
+<title>cluster_data</title>
+<polygon fill="#f8e8f0" stroke="black" points="8,-102 8,-203.94 263,-203.94 263,-102 8,-102"/>
+<text xml:space="preserve" text-anchor="middle" x="135.5" y="-184.74" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Data Layer</text>
+</g>
+<g id="clust7" class="cluster">
 <title>cluster_storage</title>
-<polygon fill="#f0f0f0" stroke="black" points="8,-15.97 8,-101.97 218,-101.97 218,-15.97 8,-15.97"/>
+<polygon fill="#f0f0f0" stroke="black" points="302,-8 302,-195.97 604,-195.97 604,-8 302,-8"/>
-<text xml:space="preserve" text-anchor="middle" x="113" y="-82.77" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">File Storage</text>
+<text xml:space="preserve" text-anchor="middle" x="453" y="-176.77" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">S3 Storage</text>
 </g>
 <!-- browser -->
 <g id="node1" class="node">
 <title>browser</title>
-<ellipse fill="none" stroke="black" cx="555" cy="-847.74" rx="69.12" ry="30.05"/>
+<ellipse fill="none" stroke="black" cx="393" cy="-793.49" rx="139.12" ry="30.05"/>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-851.69" font-family="Helvetica,sans-Serif" font-size="14.00">Browser</text>
+<text xml:space="preserve" text-anchor="middle" x="393" y="-797.44" font-family="Helvetica,sans-Serif" font-size="14.00">Browser</text>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-834.44" font-family="Helvetica,sans-Serif" font-size="14.00">mpr.local.ar</text>
+<text xml:space="preserve" text-anchor="middle" x="393" y="-780.19" font-family="Helvetica,sans-Serif" font-size="14.00">mpr.local.ar / mpr.mcrn.ar</text>
 </g>
 <!-- nginx -->
 <g id="node2" class="node">
 <title>nginx</title>
-<path fill="none" stroke="black" d="M576.5,-744.19C576.5,-744.19 533.5,-744.19 533.5,-744.19 527.5,-744.19 521.5,-738.19 521.5,-732.19 521.5,-732.19 521.5,-713.69 521.5,-713.69 521.5,-707.69 527.5,-701.69 533.5,-701.69 533.5,-701.69 576.5,-701.69 576.5,-701.69 582.5,-701.69 588.5,-707.69 588.5,-713.69 588.5,-713.69 588.5,-732.19 588.5,-732.19 588.5,-738.19 582.5,-744.19 576.5,-744.19"/>
+<path fill="none" stroke="black" d="M414.5,-705.44C414.5,-705.44 371.5,-705.44 371.5,-705.44 365.5,-705.44 359.5,-699.44 359.5,-693.44 359.5,-693.44 359.5,-674.94 359.5,-674.94 359.5,-668.94 365.5,-662.94 371.5,-662.94 371.5,-662.94 414.5,-662.94 414.5,-662.94 420.5,-662.94 426.5,-668.94 426.5,-674.94 426.5,-674.94 426.5,-693.44 426.5,-693.44 426.5,-699.44 420.5,-705.44 414.5,-705.44"/>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-726.89" font-family="Helvetica,sans-Serif" font-size="14.00">nginx</text>
+<text xml:space="preserve" text-anchor="middle" x="393" y="-688.14" font-family="Helvetica,sans-Serif" font-size="14.00">nginx</text>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-709.64" font-family="Helvetica,sans-Serif" font-size="14.00">port 80</text>
+<text xml:space="preserve" text-anchor="middle" x="393" y="-670.89" font-family="Helvetica,sans-Serif" font-size="14.00">port 80</text>
 </g>
 <!-- browser&#45;&gt;nginx -->
 <g id="edge1" class="edge">
 <title>browser&#45;&gt;nginx</title>
-<path fill="none" stroke="black" d="M555,-817.21C555,-817.21 555,-756.06 555,-756.06"/>
+<path fill="none" stroke="black" d="M393,-763.04C393,-763.04 393,-717.33 393,-717.33"/>
-<polygon fill="black" stroke="black" points="558.5,-756.06 555,-746.06 551.5,-756.06 558.5,-756.06"/>
+<polygon fill="black" stroke="black" points="396.5,-717.33 393,-707.33 389.5,-717.33 396.5,-717.33"/>
 </g>
 <!-- django -->
 <g id="node3" class="node">
 <title>django</title>
-<path fill="none" stroke="black" d="M585.5,-616.44C585.5,-616.44 524.5,-616.44 524.5,-616.44 518.5,-616.44 512.5,-610.44 512.5,-604.44 512.5,-604.44 512.5,-568.69 512.5,-568.69 512.5,-562.69 518.5,-556.69 524.5,-556.69 524.5,-556.69 585.5,-556.69 585.5,-556.69 591.5,-556.69 597.5,-562.69 597.5,-568.69 597.5,-568.69 597.5,-604.44 597.5,-604.44 597.5,-610.44 591.5,-616.44 585.5,-616.44"/>
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-<text xml:space="preserve" text-anchor="middle" x="555" y="-599.14" font-family="Helvetica,sans-Serif" font-size="14.00">Django</text>
+<text xml:space="preserve" text-anchor="middle" x="329" y="-587.64" font-family="Helvetica,sans-Serif" font-size="14.00">Django</text>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-581.89" font-family="Helvetica,sans-Serif" font-size="14.00">/admin</text>
+<text xml:space="preserve" text-anchor="middle" x="329" y="-570.39" font-family="Helvetica,sans-Serif" font-size="14.00">/admin</text>
-<text xml:space="preserve" text-anchor="middle" x="555" y="-564.64" font-family="Helvetica,sans-Serif" font-size="14.00">port 8701</text>
+<text xml:space="preserve" text-anchor="middle" x="329" y="-553.14" font-family="Helvetica,sans-Serif" font-size="14.00">port 8701</text>
 </g>
 <!-- nginx&#45;&gt;django -->
 <g id="edge2" class="edge">
 <title>nginx&#45;&gt;django</title>
-<path fill="none" stroke="black" d="M555,-701.33C555,-701.33 555,-628.2 555,-628.2"/>
+<path fill="none" stroke="black" d="M365.5,-662.63C365.5,-662.63 365.5,-616.77 365.5,-616.77"/>
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+<polygon fill="black" stroke="black" points="369,-616.77 365.5,-606.77 362,-616.77 369,-616.77"/>
-<text xml:space="preserve" text-anchor="middle" x="571.88" y="-663.19" font-family="Helvetica,sans-Serif" font-size="10.00">/admin</text>
+<text xml:space="preserve" text-anchor="middle" x="348.62" y="-642.95" font-family="Helvetica,sans-Serif" font-size="10.00">/admin</text>
 </g>
 <!-- fastapi -->
 <g id="node4" class="node">
 <title>fastapi</title>
-<path fill="none" stroke="black" d="M554.5,-485.94C554.5,-485.94 493.5,-485.94 493.5,-485.94 487.5,-485.94 481.5,-479.94 481.5,-473.94 481.5,-473.94 481.5,-438.19 481.5,-438.19 481.5,-432.19 487.5,-426.19 493.5,-426.19 493.5,-426.19 554.5,-426.19 554.5,-426.19 560.5,-426.19 566.5,-432.19 566.5,-438.19 566.5,-438.19 566.5,-473.94 566.5,-473.94 566.5,-479.94 560.5,-485.94 554.5,-485.94"/>
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-<text xml:space="preserve" text-anchor="middle" x="524" y="-468.64" font-family="Helvetica,sans-Serif" font-size="14.00">FastAPI</text>
+<text xml:space="preserve" text-anchor="middle" x="347" y="-469.89" font-family="Helvetica,sans-Serif" font-size="14.00">FastAPI</text>
-<text xml:space="preserve" text-anchor="middle" x="524" y="-451.39" font-family="Helvetica,sans-Serif" font-size="14.00">/api</text>
+<text xml:space="preserve" text-anchor="middle" x="347" y="-452.64" font-family="Helvetica,sans-Serif" font-size="14.00">/api + /graphql</text>
-<text xml:space="preserve" text-anchor="middle" x="524" y="-434.14" font-family="Helvetica,sans-Serif" font-size="14.00">port 8702</text>
+<text xml:space="preserve" text-anchor="middle" x="347" y="-435.39" font-family="Helvetica,sans-Serif" font-size="14.00">port 8702</text>
 </g>
 <!-- nginx&#45;&gt;fastapi -->
 <g id="edge3" class="edge">
 <title>nginx&#45;&gt;fastapi</title>
-<path fill="none" stroke="black" d="M521.02,-716C511.47,-716 503.63,-716 503.63,-716 503.63,-716 503.63,-497.9 503.63,-497.9"/>
+<path fill="none" stroke="black" d="M383.5,-662.84C383.5,-662.84 383.5,-498.82 383.5,-498.82"/>
-<polygon fill="black" stroke="black" points="507.13,-497.9 503.63,-487.9 500.13,-497.9 507.13,-497.9"/>
+<polygon fill="black" stroke="black" points="387,-498.82 383.5,-488.82 380,-498.82 387,-498.82"/>
-<text xml:space="preserve" text-anchor="middle" x="723" y="-583.44" font-family="Helvetica,sans-Serif" font-size="10.00">/api</text>
+<text xml:space="preserve" text-anchor="middle" x="399.44" y="-571.33" font-family="Helvetica,sans-Serif" font-size="10.00">/api, /graphql</text>
 </g>
 <!-- timeline -->
 <g id="node5" class="node">
 <title>timeline</title>
-<path fill="none" stroke="black" d="M442,-616.44C442,-616.44 372,-616.44 372,-616.44 366,-616.44 360,-610.44 360,-604.44 360,-604.44 360,-568.69 360,-568.69 360,-562.69 366,-556.69 372,-556.69 372,-556.69 442,-556.69 442,-556.69 448,-556.69 454,-562.69 454,-568.69 454,-568.69 454,-604.44 454,-604.44 454,-610.44 448,-616.44 442,-616.44"/>
+<path fill="none" stroke="black" d="M512,-604.94C512,-604.94 442,-604.94 442,-604.94 436,-604.94 430,-598.94 430,-592.94 430,-592.94 430,-557.19 430,-557.19 430,-551.19 436,-545.19 442,-545.19 442,-545.19 512,-545.19 512,-545.19 518,-545.19 524,-551.19 524,-557.19 524,-557.19 524,-592.94 524,-592.94 524,-598.94 518,-604.94 512,-604.94"/>
-<text xml:space="preserve" text-anchor="middle" x="407" y="-599.14" font-family="Helvetica,sans-Serif" font-size="14.00">Timeline UI</text>
+<text xml:space="preserve" text-anchor="middle" x="477" y="-587.64" font-family="Helvetica,sans-Serif" font-size="14.00">Timeline UI</text>
-<text xml:space="preserve" text-anchor="middle" x="407" y="-581.89" font-family="Helvetica,sans-Serif" font-size="14.00">/ui</text>
+<text xml:space="preserve" text-anchor="middle" x="477" y="-570.39" font-family="Helvetica,sans-Serif" font-size="14.00">/ui</text>
-<text xml:space="preserve" text-anchor="middle" x="407" y="-564.64" font-family="Helvetica,sans-Serif" font-size="14.00">port 5173</text>
+<text xml:space="preserve" text-anchor="middle" x="477" y="-553.14" font-family="Helvetica,sans-Serif" font-size="14.00">port 5173</text>
 </g>
 <!-- nginx&#45;&gt;timeline -->
 <g id="edge4" class="edge">
 <title>nginx&#45;&gt;timeline</title>
-<path fill="none" stroke="black" d="M521.05,-730C477.35,-730 407,-730 407,-730 407,-730 407,-628.15 407,-628.15"/>
+<path fill="none" stroke="black" d="M422.62,-662.67C422.62,-633.49 422.62,-585 422.62,-585 422.62,-585 423.34,-585 423.34,-585"/>
-<polygon fill="black" stroke="black" points="410.5,-628.15 407,-618.15 403.5,-628.15 410.5,-628.15"/>
+<polygon fill="black" stroke="black" points="418.22,-588.5 428.22,-585 418.22,-581.5 418.22,-588.5"/>
-<text xml:space="preserve" text-anchor="middle" x="450" y="-663.19" font-family="Helvetica,sans-Serif" font-size="10.00">/ui</text>
+<text xml:space="preserve" text-anchor="middle" x="416.62" y="-613.98" font-family="Helvetica,sans-Serif" font-size="10.00">/ui</text>
 </g>
-<!-- django&#45;&gt;fastapi -->
+<!-- minio -->
+<g id="node12" class="node">
+<title>minio</title>
+<polygon fill="none" stroke="black" points="415.5,-160.47 412.5,-164.47 391.5,-164.47 388.5,-160.47 312.5,-160.47 312.5,-117.97 415.5,-117.97 415.5,-160.47"/>
+<text xml:space="preserve" text-anchor="middle" x="364" y="-143.17" font-family="Helvetica,sans-Serif" font-size="14.00">MinIO (local)</text>
+<text xml:space="preserve" text-anchor="middle" x="364" y="-125.92" font-family="Helvetica,sans-Serif" font-size="14.00">port 9000</text>
+</g>
+<!-- nginx&#45;&gt;minio -->
 <g id="edge5" class="edge">
-<title>django&#45;&gt;fastapi</title>
+<title>nginx&#45;&gt;minio</title>
-<path fill="none" stroke="black" d="M539.5,-556.3C539.5,-556.3 539.5,-497.68 539.5,-497.68"/>
+<path fill="none" stroke="black" d="M414.88,-662.68C414.88,-596.12 414.88,-398 414.88,-398 414.88,-398 344.17,-398 344.17,-398 344.17,-398 344.17,-172.35 344.17,-172.35"/>
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-<text xml:space="preserve" text-anchor="middle" x="561.88" y="-518.19" font-family="Helvetica,sans-Serif" font-size="10.00">job operations</text>
+<text xml:space="preserve" text-anchor="middle" x="378.03" y="-401.25" font-family="Helvetica,sans-Serif" font-size="10.00">/media/*</text>
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-<!-- postgres -->
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-<title>postgres</title>
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-<!-- django&#45;&gt;postgres -->
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-<title>django&#45;&gt;postgres</title>
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 </g>
 <!-- grpc_server -->
 <g id="node6" class="node">
 <title>grpc_server</title>
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-<text xml:space="preserve" text-anchor="middle" x="314" y="-293.64" font-family="Helvetica,sans-Serif" font-size="14.00">port 50051</text>
+<text xml:space="preserve" text-anchor="middle" x="207" y="-334.89" font-family="Helvetica,sans-Serif" font-size="14.00">port 50051</text>
 </g>
 <!-- fastapi&#45;&gt;grpc_server -->
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+<g id="edge8" class="edge">
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+<path fill="none" stroke="black" d="M298.5,-427.06C298.5,-392.59 298.5,-341 298.5,-341 298.5,-341 270.41,-341 270.41,-341"/>
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+<text xml:space="preserve" text-anchor="middle" x="319.5" y="-373.23" font-family="Helvetica,sans-Serif" font-size="10.00">progress</text>
+</g>
+<!-- step_functions -->
+<g id="node8" class="node">
+<title>step_functions</title>
+<path fill="none" stroke="black" d="M541.38,-369.44C541.38,-369.44 446.62,-369.44 446.62,-369.44 440.62,-369.44 434.62,-363.44 434.62,-357.44 434.62,-357.44 434.62,-338.94 434.62,-338.94 434.62,-332.94 440.62,-326.94 446.62,-326.94 446.62,-326.94 541.38,-326.94 541.38,-326.94 547.38,-326.94 553.38,-332.94 553.38,-338.94 553.38,-338.94 553.38,-357.44 553.38,-357.44 553.38,-363.44 547.38,-369.44 541.38,-369.44"/>
+<text xml:space="preserve" text-anchor="middle" x="494" y="-352.14" font-family="Helvetica,sans-Serif" font-size="14.00">Step Functions</text>
+<text xml:space="preserve" text-anchor="middle" x="494" y="-334.89" font-family="Helvetica,sans-Serif" font-size="14.00">state machine</text>
+</g>
+<!-- fastapi&#45;&gt;step_functions -->
+<g id="edge13" class="edge">
+<title>fastapi&#45;&gt;step_functions</title>
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+<text xml:space="preserve" text-anchor="middle" x="338.33" y="-358.15" font-family="Helvetica,sans-Serif" font-size="10.00">boto3</text>
+<text xml:space="preserve" text-anchor="middle" x="338.33" y="-345.4" font-family="Helvetica,sans-Serif" font-size="10.00">start_execution</text>
+</g>
+<!-- postgres -->
+<g id="node10" class="node">
+<title>postgres</title>
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+<text xml:space="preserve" text-anchor="middle" x="64" y="-143.17" font-family="Helvetica,sans-Serif" font-size="14.00">PostgreSQL</text>
+<text xml:space="preserve" text-anchor="middle" x="64" y="-125.92" font-family="Helvetica,sans-Serif" font-size="14.00">port 5436</text>
 </g>
 <!-- fastapi&#45;&gt;postgres -->
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+<g id="edge7" class="edge">
 <title>fastapi&#45;&gt;postgres</title>
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+<polygon fill="black" stroke="black" points="67.5,-180.34 64,-170.34 60.5,-180.34 67.5,-180.34"/>
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-<!-- redis -->
-<g id="node10" class="node">
-<title>redis</title>
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-</g>
-<!-- fastapi&#45;&gt;redis -->
-<g id="edge9" class="edge">
-<title>fastapi&#45;&gt;redis</title>
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 </g>
 <!-- timeline&#45;&gt;fastapi -->
-<g id="edge7" class="edge">
+<g id="edge6" class="edge">
 <title>timeline&#45;&gt;fastapi</title>
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+<path fill="none" stroke="black" d="M429.59,-565C411.66,-565 395.5,-565 395.5,-565 395.5,-565 395.5,-499.11 395.5,-499.11"/>
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+<polygon fill="black" stroke="black" points="399,-499.11 395.5,-489.11 392,-499.11 399,-499.11"/>
-<text xml:space="preserve" text-anchor="middle" x="440.75" y="-518.19" font-family="Helvetica,sans-Serif" font-size="10.00">REST API</text>
+<text xml:space="preserve" text-anchor="middle" x="406.38" y="-539.6" font-family="Helvetica,sans-Serif" font-size="10.00">REST API</text>
 </g>
 <!-- celery -->
 <g id="node7" class="node">
 <title>celery</title>
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-<text xml:space="preserve" text-anchor="middle" x="227" y="-184.89" font-family="Helvetica,sans-Serif" font-size="14.00">Celery Worker</text>
+<text xml:space="preserve" text-anchor="middle" x="211" y="-251.64" font-family="Helvetica,sans-Serif" font-size="14.00">Celery Worker</text>
-<text xml:space="preserve" text-anchor="middle" x="227" y="-167.64" font-family="Helvetica,sans-Serif" font-size="14.00">(local)</text>
+<text xml:space="preserve" text-anchor="middle" x="211" y="-234.39" font-family="Helvetica,sans-Serif" font-size="14.00">(local mode)</text>
 </g>
 <!-- grpc_server&#45;&gt;celery -->
-<g id="edge11" class="edge">
+<g id="edge9" class="edge">
 <title>grpc_server&#45;&gt;celery</title>
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+<path fill="none" stroke="black" d="M207,-326.87C207,-326.87 207,-280.83 207,-280.83"/>
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-<text xml:space="preserve" text-anchor="middle" x="223.62" y="-240.81" font-family="Helvetica,sans-Serif" font-size="10.00">task dispatch</text>
+<text xml:space="preserve" text-anchor="middle" x="174.38" y="-307.1" font-family="Helvetica,sans-Serif" font-size="10.00">task dispatch</text>
-</g>
-<!-- celery&#45;&gt;grpc_server -->
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-<title>celery&#45;&gt;grpc_server</title>
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 </g>
 <!-- celery&#45;&gt;postgres -->
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+<g id="edge11" class="edge">
 <title>celery&#45;&gt;postgres</title>
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+<path fill="none" stroke="black" d="M161.88,-225.95C161.88,-194.24 161.88,-139 161.88,-139 161.88,-139 123.59,-139 123.59,-139"/>
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+<polygon fill="black" stroke="black" points="123.59,-135.5 113.59,-139 123.59,-142.5 123.59,-135.5"/>
-<text xml:space="preserve" text-anchor="middle" x="392.5" y="-121.19" font-family="Helvetica,sans-Serif" font-size="10.00">job updates</text>
+<text xml:space="preserve" text-anchor="middle" x="133.38" y="-166.59" font-family="Helvetica,sans-Serif" font-size="10.00">job updates</text>
+</g>
+<!-- redis -->
+<g id="node11" class="node">
+<title>redis</title>
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+<path fill="none" stroke="black" d="M254.5,-163.12C254.5,-160.19 235.45,-157.81 212,-157.81 188.55,-157.81 169.5,-160.19 169.5,-163.12"/>
+<text xml:space="preserve" text-anchor="middle" x="212" y="-143.17" font-family="Helvetica,sans-Serif" font-size="14.00">Redis</text>
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 </g>
 <!-- celery&#45;&gt;redis -->
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+<g id="edge10" class="edge">
 <title>celery&#45;&gt;redis</title>
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+<path fill="none" stroke="black" d="M212,-226C212,-226 212,-180.19 212,-180.19"/>
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+<polygon fill="black" stroke="black" points="215.5,-180.19 212,-170.19 208.5,-180.19 215.5,-180.19"/>
-<text xml:space="preserve" text-anchor="middle" x="286" y="-121.19" font-family="Helvetica,sans-Serif" font-size="10.00">queue</text>
+<text xml:space="preserve" text-anchor="middle" x="197" y="-206.34" font-family="Helvetica,sans-Serif" font-size="10.00">queue</text>
 </g>
-<!-- local_fs -->
+<!-- celery&#45;&gt;minio -->
-<g id="node12" class="node">
+<g id="edge12" class="edge">
-<title>local_fs</title>
+<title>celery&#45;&gt;minio</title>
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+<path fill="none" stroke="black" d="M261.12,-225.95C261.12,-194.24 261.12,-139 261.12,-139 261.12,-139 300.75,-139 300.75,-139"/>
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-<text xml:space="preserve" text-anchor="middle" x="174" y="-31.92" font-family="Helvetica,sans-Serif" font-size="14.00">/media</text>
+<text xml:space="preserve" text-anchor="middle" x="302.75" y="-178.67" font-family="Helvetica,sans-Serif" font-size="10.00">S3 API</text>
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+<text xml:space="preserve" text-anchor="middle" x="302.75" y="-165.92" font-family="Helvetica,sans-Serif" font-size="10.00">download/upload</text>
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 </g>
 <!-- lambda -->
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+<g id="node9" class="node">
 <title>lambda</title>
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-<text xml:space="preserve" text-anchor="middle" x="169" y="-293.64" font-family="Helvetica,sans-Serif" font-size="14.00">(cloud)</text>
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-<!-- sqs -->
+<!-- step_functions&#45;&gt;lambda -->
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+<g id="edge14" class="edge">
-<title>sqs</title>
+<title>step_functions&#45;&gt;lambda</title>
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-<!-- lambda&#45;&gt;sqs -->
+<!-- lambda&#45;&gt;fastapi -->
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+<text xml:space="preserve" text-anchor="middle" x="768.85" y="-160" font-family="Helvetica,sans-Serif" font-size="10.00">1:N preset</text>
 </g>
 <!-- TranscodeJob&#45;&gt;MediaAsset -->
 <g id="edge3" class="edge">
 <title>TranscodeJob&#45;&gt;MediaAsset</title>
-<path fill="none" stroke="black" stroke-dasharray="5,2" d="M995.06,-161.83C995.06,-161.83 719.99,-161.83 719.99,-161.83"/>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M911.86,-214.5C911.86,-214.5 719.76,-214.5 719.76,-214.5"/>
-<polygon fill="black" stroke="black" points="719.99,-158.33 709.99,-161.83 719.99,-165.33 719.99,-158.33"/>
+<polygon fill="black" stroke="black" points="719.76,-211 709.76,-214.5 719.76,-218 719.76,-211"/>
-<text xml:space="preserve" text-anchor="middle" x="910.62" y="-134.25" font-family="Helvetica,sans-Serif" font-size="10.00">1:1 output_asset</text>
+<text xml:space="preserve" text-anchor="middle" x="775.31" y="-205" font-family="Helvetica,sans-Serif" font-size="10.00">1:1 output_asset</text>
 </g>
 </g>
 </svg>

docs/architecture/03-job-flow.dot

@@ -3,7 +3,6 @@ digraph job_flow {
     node [shape=box, style=rounded, fontname="Helvetica"]
     edge [fontname="Helvetica", fontsize=10]
 
-    // Title
     labelloc="t"
     label="MPR - Job Flow"
     fontsize=16
@@ -11,7 +10,19 @@ digraph job_flow {
 
     graph [splines=ortho, nodesep=0.6, ranksep=0.6]
 
-    // States
+    // API entry points
+    subgraph cluster_api {
+        label="API Entry Points"
+        style=dashed
+        color=gray
+
+        rest_create [label="POST /api/jobs/", shape=ellipse]
+        gql_create [label="mutation createJob", shape=ellipse]
+        rest_cancel [label="POST /api/jobs/{id}/cancel", shape=ellipse]
+        rest_callback [label="POST /api/jobs/{id}/callback", shape=ellipse]
+    }
+
+    // Job states
     subgraph cluster_states {
         label="Job States"
         style=filled
@@ -24,78 +35,70 @@ digraph job_flow {
         cancelled [label="CANCELLED", fillcolor="#6c757d", style="filled,rounded", fontcolor=white]
     }
 
-    // Transitions
+    // State transitions
-    pending -> processing [label="worker picks up"]
+    pending -> processing [xlabel="worker picks up"]
-    processing -> completed [label="success"]
+    processing -> completed [xlabel="success"]
-    processing -> failed [label="error"]
+    processing -> failed [xlabel="error"]
-    pending -> cancelled [label="user cancels"]
+    pending -> cancelled [xlabel="user cancels"]
-    processing -> cancelled [label="user cancels"]
+    processing -> cancelled [xlabel="user cancels"]
-    failed -> pending [label="retry"]
+    failed -> pending [xlabel="retry"]
 
-    // API actions
+    rest_create -> pending
-    subgraph cluster_api {
+    gql_create -> pending
-        label="API Actions"
+    rest_cancel -> cancelled [style=dashed]
-        style=dashed
-        color=gray
 
-        create_job [label="POST /jobs/", shape=ellipse]
+    // Executor dispatch
-        cancel_job [label="POST /jobs/{id}/cancel", shape=ellipse]
+    subgraph cluster_dispatch {
-        retry_job [label="POST /jobs/{id}/retry", shape=ellipse]
+        label="Executor Dispatch"
-    }
-
-    create_job -> pending
-    cancel_job -> cancelled [style=dashed]
-    retry_job -> pending [style=dashed]
-
-    // Executor layer
-    subgraph cluster_executor {
-        label="Executor Layer"
         style=filled
         fillcolor="#fff8e8"
 
-        executor [label="Executor\n(abstract)", shape=diamond]
+        dispatch [label="MPR_EXECUTOR", shape=diamond]
-        local [label="LocalExecutor\nCelery + FFmpeg"]
-        lambda_exec [label="LambdaExecutor\nSQS + Lambda"]
     }
 
-    processing -> executor
+    pending -> dispatch
-    executor -> local [label="MPR_EXECUTOR=local"]
-    executor -> lambda_exec [label="MPR_EXECUTOR=lambda", style=dashed]
 
-    // FFmpeg operations
+    // Local path
-    subgraph cluster_ffmpeg {
+    subgraph cluster_local {
-        label="FFmpeg Operations"
+        label="Local Mode (Celery)"
         style=filled
         fillcolor="#e8f4e8"
 
-        transcode [label="Transcode\n(with preset)"]
+        celery_task [label="Celery Task\n(transcode queue)"]
-        trim [label="Trim\n(-c:v copy -c:a copy)"]
+        s3_download [label="S3 Download\n(MinIO)"]
+        ffmpeg_local [label="FFmpeg\ntranscode/trim"]
+        s3_upload [label="S3 Upload\n(MinIO)"]
+        db_update [label="DB Update\n(update_job_progress)"]
     }
 
-    local -> transcode
+    dispatch -> celery_task [xlabel="local"]
-    local -> trim
+    celery_task -> s3_download
+    s3_download -> ffmpeg_local
+    ffmpeg_local -> s3_upload
+    s3_upload -> db_update
+    db_update -> completed [style=dotted]
 
-    // gRPC streaming
+    // Lambda path
-    subgraph cluster_grpc {
+    subgraph cluster_lambda {
-        label="gRPC Communication"
+        label="Lambda Mode (AWS)"
         style=filled
-        fillcolor="#e8e8f8"
+        fillcolor="#fde8d0"
 
-        grpc_stream [label="StreamProgress\n(server streaming)", shape=parallelogram]
+        sfn_start [label="Step Functions\nstart_execution"]
-        grpc_submit [label="SubmitJob\n(unary)", shape=parallelogram]
+        lambda_fn [label="Lambda\nFFmpeg container"]
-        grpc_cancel [label="CancelJob\n(unary)", shape=parallelogram]
+        s3_dl_aws [label="S3 Download\n(AWS)"]
+        ffmpeg_aws [label="FFmpeg\ntranscode/trim"]
+        s3_ul_aws [label="S3 Upload\n(AWS)"]
+        callback [label="HTTP Callback\nPOST /jobs/{id}/callback"]
     }
 
-    // Progress tracking via gRPC
+    dispatch -> sfn_start [xlabel="lambda"]
-    progress [label="Progress Updates\n(gRPC → Redis → DB)", shape=note]
+    sfn_start -> lambda_fn
-    transcode -> progress [style=dotted]
+    lambda_fn -> s3_dl_aws
-    trim -> progress [style=dotted]
+    s3_dl_aws -> ffmpeg_aws
-    progress -> grpc_stream [style=dotted, label="stream to client"]
+    ffmpeg_aws -> s3_ul_aws
-    grpc_stream -> processing [style=dotted, label="update status"]
+    s3_ul_aws -> callback
+    callback -> completed [style=dotted]
 
-    // gRPC job control
+    rest_callback -> completed [style=dashed, xlabel="Lambda reports"]
-    create_job -> grpc_submit [label="via gRPC"]
-    grpc_submit -> pending [style=dashed]
-    cancel_job -> grpc_cancel [label="via gRPC"]
-    grpc_cancel -> cancelled [style=dashed]
 }

docs/architecture/03-job-flow.svg

@@ -1,296 +1,329 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<!-- Generated by graphviz version 14.1.1 (0)
+<!-- Generated by graphviz version 14.1.2 (0)
  -->
 <!-- Title: job_flow Pages: 1 -->
-<svg width="1398pt" height="843pt"
+<svg width="1621pt" height="655pt"
- viewBox="0.00 0.00 1398.00 843.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+ viewBox="0.00 0.00 1621.00 655.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 838.75)">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 650.5)">
 <title>job_flow</title>
-<polygon fill="white" stroke="none" points="-4,4 -4,-838.75 1394,-838.75 1394,4 -4,4"/>
+<polygon fill="white" stroke="none" points="-4,4 -4,-650.5 1617,-650.5 1617,4 -4,4"/>
-<text xml:space="preserve" text-anchor="middle" x="695" y="-815.55" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">MPR &#45; Job Flow</text>
+<text xml:space="preserve" text-anchor="middle" x="806.5" y="-627.3" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">MPR &#45; Job Flow</text>
 <g id="clust1" class="cluster">
-<title>cluster_states</title>
+<title>cluster_api</title>
-<polygon fill="#f8f8f8" stroke="black" points="774,-8 774,-297.5 1154,-297.5 1154,-8 774,-8"/>
+<polygon fill="none" stroke="gray" stroke-dasharray="5,2" points="297,-269.75 297,-349.25 1395,-349.25 1395,-269.75 297,-269.75"/>
-<text xml:space="preserve" text-anchor="middle" x="964" y="-278.3" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Job States</text>
+<text xml:space="preserve" text-anchor="middle" x="846" y="-330.05" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">API Entry Points</text>
 </g>
 <g id="clust2" class="cluster">
-<title>cluster_api</title>
+<title>cluster_states</title>
-<polygon fill="none" stroke="gray" stroke-dasharray="5,2" points="674,-360 674,-439.5 1382,-439.5 1382,-360 674,-360"/>
+<polygon fill="#f8f8f8" stroke="black" points="572,-11.25 572,-261.75 939,-261.75 939,-11.25 572,-11.25"/>
-<text xml:space="preserve" text-anchor="middle" x="1028" y="-420.3" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">API Actions</text>
+<text xml:space="preserve" text-anchor="middle" x="755.5" y="-242.55" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Job States</text>
 </g>
 <g id="clust3" class="cluster">
-<title>cluster_executor</title>
+<title>cluster_dispatch</title>
-<polygon fill="#fff8e8" stroke="black" points="8,-571.5 8,-799.25 352,-799.25 352,-571.5 8,-571.5"/>
+<polygon fill="#fff8e8" stroke="black" points="103,-531.5 103,-611 377,-611 377,-531.5 103,-531.5"/>
-<text xml:space="preserve" text-anchor="middle" x="180" y="-780.05" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Executor Layer</text>
+<text xml:space="preserve" text-anchor="middle" x="240" y="-591.8" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Executor Dispatch</text>
 </g>
 <g id="clust4" class="cluster">
-<title>cluster_ffmpeg</title>
+<title>cluster_local</title>
-<polygon fill="#e8f4e8" stroke="black" points="73,-462.5 73,-548.5 393,-548.5 393,-462.5 73,-462.5"/>
+<polygon fill="#e8f4e8" stroke="black" points="8,-93.5 8,-523.5 203,-523.5 203,-93.5 8,-93.5"/>
-<text xml:space="preserve" text-anchor="middle" x="233" y="-529.3" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">FFmpeg Operations</text>
+<text xml:space="preserve" text-anchor="middle" x="105.5" y="-504.3" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Local Mode (Celery)</text>
 </g>
 <g id="clust5" class="cluster">
-<title>cluster_grpc</title>
+<title>cluster_lambda</title>
-<polygon fill="#e8e8f8" stroke="black" points="8,-193.5 8,-322 766,-322 766,-193.5 8,-193.5"/>
+<polygon fill="#fde8d0" stroke="black" points="1403,-8 1403,-523.5 1605,-523.5 1605,-8 1403,-8"/>
-<text xml:space="preserve" text-anchor="middle" x="387" y="-302.8" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">gRPC Communication</text>
+<text xml:space="preserve" text-anchor="middle" x="1504" y="-504.3" font-family="Helvetica,sans-Serif" font-weight="bold" font-size="16.00">Lambda Mode (AWS)</text>
+</g>
+<!-- rest_create -->
+<g id="node1" class="node">
+<title>rest_create</title>
+<ellipse fill="none" stroke="black" cx="389" cy="-295.75" rx="84.35" ry="18"/>
+<text xml:space="preserve" text-anchor="middle" x="389" y="-291.07" font-family="Helvetica,sans-Serif" font-size="14.00">POST /api/jobs/</text>
 </g>
 <!-- pending -->
-<g id="node1" class="node">
+<g id="node5" class="node">
 <title>pending</title>
-<path fill="#ffc107" stroke="black" d="M971.88,-262C971.88,-262 916.12,-262 916.12,-262 910.12,-262 904.12,-256 904.12,-250 904.12,-250 904.12,-238 904.12,-238 904.12,-232 910.12,-226 916.12,-226 916.12,-226 971.88,-226 971.88,-226 977.88,-226 983.88,-232 983.88,-238 983.88,-238 983.88,-250 983.88,-250 983.88,-256 977.88,-262 971.88,-262"/>
+<path fill="#ffc107" stroke="black" d="M647.88,-226.25C647.88,-226.25 592.12,-226.25 592.12,-226.25 586.12,-226.25 580.12,-220.25 580.12,-214.25 580.12,-214.25 580.12,-202.25 580.12,-202.25 580.12,-196.25 586.12,-190.25 592.12,-190.25 592.12,-190.25 647.88,-190.25 647.88,-190.25 653.88,-190.25 659.88,-196.25 659.88,-202.25 659.88,-202.25 659.88,-214.25 659.88,-214.25 659.88,-220.25 653.88,-226.25 647.88,-226.25"/>
-<text xml:space="preserve" text-anchor="middle" x="944" y="-239.32" font-family="Helvetica,sans-Serif" font-size="14.00">PENDING</text>
+<text xml:space="preserve" text-anchor="middle" x="620" y="-203.57" font-family="Helvetica,sans-Serif" font-size="14.00">PENDING</text>
+</g>
+<!-- rest_create&#45;&gt;pending -->
+<g id="edge7" class="edge">
+<title>rest_create&#45;&gt;pending</title>
+<path fill="none" stroke="black" d="M389,-277.61C389,-253.52 389,-214 389,-214 389,-214 568.25,-214 568.25,-214"/>
+<polygon fill="black" stroke="black" points="568.25,-217.5 578.25,-214 568.25,-210.5 568.25,-217.5"/>
+</g>
+<!-- gql_create -->
+<g id="node2" class="node">
+<title>gql_create</title>
+<ellipse fill="none" stroke="black" cx="620" cy="-295.75" rx="103.29" ry="18"/>
+<text xml:space="preserve" text-anchor="middle" x="620" y="-291.07" font-family="Helvetica,sans-Serif" font-size="14.00">mutation createJob</text>
+</g>
+<!-- gql_create&#45;&gt;pending -->
+<g id="edge8" class="edge">
+<title>gql_create&#45;&gt;pending</title>
+<path fill="none" stroke="black" d="M620,-277.62C620,-277.62 620,-238.17 620,-238.17"/>
+<polygon fill="black" stroke="black" points="623.5,-238.17 620,-228.17 616.5,-238.17 623.5,-238.17"/>
+</g>
+<!-- rest_cancel -->
+<g id="node3" class="node">
+<title>rest_cancel</title>
+<ellipse fill="none" stroke="black" cx="1247" cy="-295.75" rx="140.12" ry="18"/>
+<text xml:space="preserve" text-anchor="middle" x="1247" y="-291.07" font-family="Helvetica,sans-Serif" font-size="14.00">POST /api/jobs/{id}/cancel</text>
+</g>
+<!-- cancelled -->
+<g id="node9" class="node">
+<title>cancelled</title>
+<path fill="#6c757d" stroke="black" d="M918.62,-55.25C918.62,-55.25 843.38,-55.25 843.38,-55.25 837.38,-55.25 831.38,-49.25 831.38,-43.25 831.38,-43.25 831.38,-31.25 831.38,-31.25 831.38,-25.25 837.38,-19.25 843.38,-19.25 843.38,-19.25 918.62,-19.25 918.62,-19.25 924.62,-19.25 930.62,-25.25 930.62,-31.25 930.62,-31.25 930.62,-43.25 930.62,-43.25 930.62,-49.25 924.62,-55.25 918.62,-55.25"/>
+<text xml:space="preserve" text-anchor="middle" x="881" y="-32.58" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">CANCELLED</text>
+</g>
+<!-- rest_cancel&#45;&gt;cancelled -->
+<g id="edge9" class="edge">
+<title>rest_cancel&#45;&gt;cancelled</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M1247,-277.56C1247,-218.66 1247,-37 1247,-37 1247,-37 942.64,-37 942.64,-37"/>
+<polygon fill="black" stroke="black" points="942.64,-33.5 932.64,-37 942.64,-40.5 942.64,-33.5"/>
+</g>
+<!-- rest_callback -->
+<g id="node4" class="node">
+<title>rest_callback</title>
+<ellipse fill="none" stroke="black" cx="915" cy="-295.75" rx="148.54" ry="18"/>
+<text xml:space="preserve" text-anchor="middle" x="915" y="-291.07" font-family="Helvetica,sans-Serif" font-size="14.00">POST /api/jobs/{id}/callback</text>
+</g>
+<!-- completed -->
+<g id="node7" class="node">
+<title>completed</title>
+<path fill="#28a745" stroke="black" d="M776.75,-55.25C776.75,-55.25 699.25,-55.25 699.25,-55.25 693.25,-55.25 687.25,-49.25 687.25,-43.25 687.25,-43.25 687.25,-31.25 687.25,-31.25 687.25,-25.25 693.25,-19.25 699.25,-19.25 699.25,-19.25 776.75,-19.25 776.75,-19.25 782.75,-19.25 788.75,-25.25 788.75,-31.25 788.75,-31.25 788.75,-43.25 788.75,-43.25 788.75,-49.25 782.75,-55.25 776.75,-55.25"/>
+<text xml:space="preserve" text-anchor="middle" x="738" y="-32.58" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">COMPLETED</text>
+</g>
+<!-- rest_callback&#45;&gt;completed -->
+<g id="edge24" class="edge">
+<title>rest_callback&#45;&gt;completed</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M783.42,-287.15C783.42,-287.15 783.42,-67.24 783.42,-67.24"/>
+<polygon fill="black" stroke="black" points="786.92,-67.24 783.42,-57.24 779.92,-67.24 786.92,-67.24"/>
+<text xml:space="preserve" text-anchor="middle" x="745.17" y="-180.44" font-family="Helvetica,sans-Serif" font-size="10.00">Lambda reports</text>
 </g>
 <!-- processing -->
-<g id="node2" class="node">
+<g id="node6" class="node">
 <title>processing</title>
-<path fill="#17a2b8" stroke="black" d="M877.75,-144.75C877.75,-144.75 794.25,-144.75 794.25,-144.75 788.25,-144.75 782.25,-138.75 782.25,-132.75 782.25,-132.75 782.25,-120.75 782.25,-120.75 782.25,-114.75 788.25,-108.75 794.25,-108.75 794.25,-108.75 877.75,-108.75 877.75,-108.75 883.75,-108.75 889.75,-114.75 889.75,-120.75 889.75,-120.75 889.75,-132.75 889.75,-132.75 889.75,-138.75 883.75,-144.75 877.75,-144.75"/>
+<path fill="#17a2b8" stroke="black" d="M768.75,-140.75C768.75,-140.75 685.25,-140.75 685.25,-140.75 679.25,-140.75 673.25,-134.75 673.25,-128.75 673.25,-128.75 673.25,-116.75 673.25,-116.75 673.25,-110.75 679.25,-104.75 685.25,-104.75 685.25,-104.75 768.75,-104.75 768.75,-104.75 774.75,-104.75 780.75,-110.75 780.75,-116.75 780.75,-116.75 780.75,-128.75 780.75,-128.75 780.75,-134.75 774.75,-140.75 768.75,-140.75"/>
-<text xml:space="preserve" text-anchor="middle" x="836" y="-122.08" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">PROCESSING</text>
+<text xml:space="preserve" text-anchor="middle" x="727" y="-118.08" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">PROCESSING</text>
 </g>
 <!-- pending&#45;&gt;processing -->
 <g id="edge1" class="edge">
 <title>pending&#45;&gt;processing</title>
-<path fill="none" stroke="black" d="M920.04,-225.68C920.04,-194.87 920.04,-136 920.04,-136 920.04,-136 901.69,-136 901.69,-136"/>
+<path fill="none" stroke="black" d="M654.58,-189.87C654.58,-166.46 654.58,-129 654.58,-129 654.58,-129 661.34,-129 661.34,-129"/>
-<polygon fill="black" stroke="black" points="901.69,-132.5 891.69,-136 901.69,-139.5 901.69,-132.5"/>
+<polygon fill="black" stroke="black" points="661.34,-132.5 671.34,-129 661.34,-125.5 661.34,-132.5"/>
-<text xml:space="preserve" text-anchor="middle" x="902.25" y="-170" font-family="Helvetica,sans-Serif" font-size="10.00">worker picks up</text>
+<text xml:space="preserve" text-anchor="middle" x="616.33" y="-159.3" font-family="Helvetica,sans-Serif" font-size="10.00">worker picks up</text>
-</g>
-<!-- cancelled -->
-<g id="node5" class="node">
-<title>cancelled</title>
-<path fill="#6c757d" stroke="black" d="M1122.62,-52C1122.62,-52 1047.38,-52 1047.38,-52 1041.38,-52 1035.38,-46 1035.38,-40 1035.38,-40 1035.38,-28 1035.38,-28 1035.38,-22 1041.38,-16 1047.38,-16 1047.38,-16 1122.62,-16 1122.62,-16 1128.62,-16 1134.62,-22 1134.62,-28 1134.62,-28 1134.62,-40 1134.62,-40 1134.62,-46 1128.62,-52 1122.62,-52"/>
-<text xml:space="preserve" text-anchor="middle" x="1085" y="-29.32" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">CANCELLED</text>
 </g>
 <!-- pending&#45;&gt;cancelled -->
 <g id="edge4" class="edge">
 <title>pending&#45;&gt;cancelled</title>
-<path fill="none" stroke="black" d="M984.17,-238C1022.83,-238 1075.49,-238 1075.49,-238 1075.49,-238 1075.49,-63.98 1075.49,-63.98"/>
+<path fill="none" stroke="black" d="M660.36,-208C737.33,-208 897.54,-208 897.54,-208 897.54,-208 897.54,-67.04 897.54,-67.04"/>
-<polygon fill="black" stroke="black" points="1078.99,-63.98 1075.49,-53.98 1071.99,-63.98 1078.99,-63.98"/>
+<polygon fill="black" stroke="black" points="901.04,-67.04 897.54,-57.04 894.04,-67.04 901.04,-67.04"/>
-<text xml:space="preserve" text-anchor="middle" x="1115.38" y="-123.62" font-family="Helvetica,sans-Serif" font-size="10.00">user cancels</text>
+<text xml:space="preserve" text-anchor="middle" x="819.06" y="-211.25" font-family="Helvetica,sans-Serif" font-size="10.00">user cancels</text>
 </g>
-<!-- completed -->
+<!-- dispatch -->
-<g id="node3" class="node">
+<g id="node10" class="node">
-<title>completed</title>
+<title>dispatch</title>
-<path fill="#28a745" stroke="black" d="M871.75,-52C871.75,-52 794.25,-52 794.25,-52 788.25,-52 782.25,-46 782.25,-40 782.25,-40 782.25,-28 782.25,-28 782.25,-22 788.25,-16 794.25,-16 794.25,-16 871.75,-16 871.75,-16 877.75,-16 883.75,-22 883.75,-28 883.75,-28 883.75,-40 883.75,-40 883.75,-46 877.75,-52 871.75,-52"/>
+<path fill="none" stroke="black" d="M228.12,-573.84C228.12,-573.84 122.92,-559.16 122.92,-559.16 116.98,-558.33 116.98,-556.67 122.92,-555.84 122.92,-555.84 228.12,-541.16 228.12,-541.16 234.06,-540.33 245.94,-540.33 251.88,-541.16 251.88,-541.16 357.08,-555.84 357.08,-555.84 363.02,-556.67 363.02,-558.33 357.08,-559.16 357.08,-559.16 251.88,-573.84 251.88,-573.84 245.94,-574.67 234.06,-574.67 228.12,-573.84"/>
-<text xml:space="preserve" text-anchor="middle" x="833" y="-29.32" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">COMPLETED</text>
+<text xml:space="preserve" text-anchor="middle" x="240" y="-552.83" font-family="Helvetica,sans-Serif" font-size="14.00">MPR_EXECUTOR</text>
+</g>
+<!-- pending&#45;&gt;dispatch -->
+<g id="edge10" class="edge">
+<title>pending&#45;&gt;dispatch</title>
+<path fill="none" stroke="black" d="M579.92,-202C483.92,-202 248.76,-202 248.76,-202 248.76,-202 248.76,-528.84 248.76,-528.84"/>
+<polygon fill="black" stroke="black" points="245.26,-528.84 248.76,-538.84 252.26,-528.84 245.26,-528.84"/>
 </g>
 <!-- processing&#45;&gt;completed -->
 <g id="edge2" class="edge">
 <title>processing&#45;&gt;completed</title>
-<path fill="none" stroke="black" d="M833,-108.43C833,-108.43 833,-63.8 833,-63.8"/>
+<path fill="none" stroke="black" d="M734,-104.62C734,-104.62 734,-67.16 734,-67.16"/>
-<polygon fill="black" stroke="black" points="836.5,-63.8 833,-53.8 829.5,-63.8 836.5,-63.8"/>
+<polygon fill="black" stroke="black" points="737.5,-67.16 734,-57.16 730.5,-67.16 737.5,-67.16"/>
-<text xml:space="preserve" text-anchor="middle" x="844.12" y="-77.25" font-family="Helvetica,sans-Serif" font-size="10.00">success</text>
+<text xml:space="preserve" text-anchor="middle" x="714.88" y="-89.14" font-family="Helvetica,sans-Serif" font-size="10.00">success</text>
 </g>
 <!-- failed -->
-<g id="node4" class="node">
+<g id="node8" class="node">
 <title>failed</title>
-<path fill="#dc3545" stroke="black" d="M980,-52C980,-52 940,-52 940,-52 934,-52 928,-46 928,-40 928,-40 928,-28 928,-28 928,-22 934,-16 940,-16 940,-16 980,-16 980,-16 986,-16 992,-22 992,-28 992,-28 992,-40 992,-40 992,-46 986,-52 980,-52"/>
+<path fill="#dc3545" stroke="black" d="M632,-55.25C632,-55.25 592,-55.25 592,-55.25 586,-55.25 580,-49.25 580,-43.25 580,-43.25 580,-31.25 580,-31.25 580,-25.25 586,-19.25 592,-19.25 592,-19.25 632,-19.25 632,-19.25 638,-19.25 644,-25.25 644,-31.25 644,-31.25 644,-43.25 644,-43.25 644,-49.25 638,-55.25 632,-55.25"/>
-<text xml:space="preserve" text-anchor="middle" x="960" y="-29.32" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">FAILED</text>
+<text xml:space="preserve" text-anchor="middle" x="612" y="-32.58" font-family="Helvetica,sans-Serif" font-size="14.00" fill="white">FAILED</text>
 </g>
 <!-- processing&#45;&gt;failed -->
 <g id="edge3" class="edge">
 <title>processing&#45;&gt;failed</title>
-<path fill="none" stroke="black" d="M890.02,-118C918.1,-118 946.62,-118 946.62,-118 946.62,-118 946.62,-63.74 946.62,-63.74"/>
+<path fill="none" stroke="black" d="M680.25,-104.62C680.25,-77.88 680.25,-31 680.25,-31 680.25,-31 655.64,-31 655.64,-31"/>
-<polygon fill="black" stroke="black" points="950.13,-63.74 946.63,-53.74 943.13,-63.74 950.13,-63.74"/>
+<polygon fill="black" stroke="black" points="655.64,-27.5 645.64,-31 655.64,-34.5 655.64,-27.5"/>
-<text xml:space="preserve" text-anchor="middle" x="922.62" y="-77.25" font-family="Helvetica,sans-Serif" font-size="10.00">error</text>
+<text xml:space="preserve" text-anchor="middle" x="668.62" y="-58.76" font-family="Helvetica,sans-Serif" font-size="10.00">error</text>
 </g>
 <!-- processing&#45;&gt;cancelled -->
 <g id="edge5" class="edge">
 <title>processing&#45;&gt;cancelled</title>
-<path fill="none" stroke="black" d="M890.24,-127C953.27,-127 1048.75,-127 1048.75,-127 1048.75,-127 1048.75,-63.89 1048.75,-63.89"/>
+<path fill="none" stroke="black" d="M780.93,-123C819.44,-123 864.46,-123 864.46,-123 864.46,-123 864.46,-66.95 864.46,-66.95"/>
-<polygon fill="black" stroke="black" points="1052.25,-63.89 1048.75,-53.89 1045.25,-63.89 1052.25,-63.89"/>
+<polygon fill="black" stroke="black" points="867.96,-66.95 864.46,-56.95 860.96,-66.95 867.96,-66.95"/>
-<text xml:space="preserve" text-anchor="middle" x="1012.38" y="-77.25" font-family="Helvetica,sans-Serif" font-size="10.00">user cancels</text>
+<text xml:space="preserve" text-anchor="middle" x="820.35" y="-126.25" font-family="Helvetica,sans-Serif" font-size="10.00">user cancels</text>
-</g>
-<!-- executor -->
-<g id="node9" class="node">
-<title>executor</title>
-<path fill="none" stroke="black" d="M89.31,-758.31C89.31,-758.31 27.19,-726.69 27.19,-726.69 21.85,-723.97 21.85,-718.53 27.19,-715.81 27.19,-715.81 89.31,-684.19 89.31,-684.19 94.65,-681.47 105.35,-681.47 110.69,-684.19 110.69,-684.19 172.81,-715.81 172.81,-715.81 178.15,-718.53 178.15,-723.97 172.81,-726.69 172.81,-726.69 110.69,-758.31 110.69,-758.31 105.35,-761.03 94.65,-761.03 89.31,-758.31"/>
-<text xml:space="preserve" text-anchor="middle" x="100" y="-725.2" font-family="Helvetica,sans-Serif" font-size="14.00">Executor</text>
-<text xml:space="preserve" text-anchor="middle" x="100" y="-707.95" font-family="Helvetica,sans-Serif" font-size="14.00">(abstract)</text>
-</g>
-<!-- processing&#45;&gt;executor -->
-<g id="edge10" class="edge">
-<title>processing&#45;&gt;executor</title>
-<path fill="none" stroke="black" d="M836.12,-145.19C836.12,-245.49 836.12,-721 836.12,-721 836.12,-721 195.6,-721 195.6,-721"/>
-<polygon fill="black" stroke="black" points="195.6,-717.5 185.6,-721 195.6,-724.5 195.6,-717.5"/>
 </g>
 <!-- failed&#45;&gt;pending -->
 <g id="edge6" class="edge">
 <title>failed&#45;&gt;pending</title>
-<path fill="none" stroke="black" d="M965.25,-52.27C965.25,-52.27 965.25,-214.11 965.25,-214.11"/>
+<path fill="none" stroke="black" d="M612.06,-55.55C612.06,-55.55 612.06,-178.31 612.06,-178.31"/>
-<polygon fill="black" stroke="black" points="961.75,-214.11 965.25,-224.11 968.75,-214.11 961.75,-214.11"/>
+<polygon fill="black" stroke="black" points="608.56,-178.31 612.06,-188.31 615.56,-178.31 608.56,-178.31"/>
-<text xml:space="preserve" text-anchor="middle" x="987.62" y="-123.62" font-family="Helvetica,sans-Serif" font-size="10.00">retry</text>
+<text xml:space="preserve" text-anchor="middle" x="600.44" y="-120.18" font-family="Helvetica,sans-Serif" font-size="10.00">retry</text>
 </g>
-<!-- create_job -->
+<!-- celery_task -->
-<g id="node6" class="node">
-<title>create_job</title>
-<ellipse fill="none" stroke="black" cx="748" cy="-386" rx="66.47" ry="18"/>
-<text xml:space="preserve" text-anchor="middle" x="748" y="-381.32" font-family="Helvetica,sans-Serif" font-size="14.00">POST /jobs/</text>
-</g>
-<!-- create_job&#45;&gt;pending -->
-<g id="edge7" class="edge">
-<title>create_job&#45;&gt;pending</title>
-<path fill="none" stroke="black" d="M798.36,-373.89C798.36,-339.55 798.36,-244 798.36,-244 798.36,-244 892.3,-244 892.3,-244"/>
-<polygon fill="black" stroke="black" points="892.3,-247.5 902.3,-244 892.3,-240.5 892.3,-247.5"/>
-</g>
-<!-- grpc_submit -->
-<g id="node15" class="node">
-<title>grpc_submit</title>
-<path fill="none" stroke="black" d="M528.46,-286.5C528.46,-286.5 408.56,-286.5 408.56,-286.5 402.56,-286.5 394.16,-281 391.77,-275.5 391.77,-275.5 364.33,-212.5 364.33,-212.5 361.94,-207 365.54,-201.5 371.54,-201.5 371.54,-201.5 491.44,-201.5 491.44,-201.5 497.44,-201.5 505.84,-207 508.23,-212.5 508.23,-212.5 535.67,-275.5 535.67,-275.5 538.06,-281 534.46,-286.5 528.46,-286.5"/>
-<text xml:space="preserve" text-anchor="middle" x="450" y="-247.95" font-family="Helvetica,sans-Serif" font-size="14.00">SubmitJob</text>
-<text xml:space="preserve" text-anchor="middle" x="450" y="-230.7" font-family="Helvetica,sans-Serif" font-size="14.00">(unary)</text>
-</g>
-<!-- create_job&#45;&gt;grpc_submit -->
-<g id="edge19" class="edge">
-<title>create_job&#45;&gt;grpc_submit</title>
-<path fill="none" stroke="black" d="M681.06,-386C596.67,-386 462.48,-386 462.48,-386 462.48,-386 462.48,-298.5 462.48,-298.5"/>
-<polygon fill="black" stroke="black" points="465.98,-298.5 462.48,-288.5 458.98,-298.5 465.98,-298.5"/>
-<text xml:space="preserve" text-anchor="middle" x="620.75" y="-333.25" font-family="Helvetica,sans-Serif" font-size="10.00">via gRPC</text>
-</g>
-<!-- cancel_job -->
-<g id="node7" class="node">
-<title>cancel_job</title>
-<ellipse fill="none" stroke="black" cx="980" cy="-386" rx="122.23" ry="18"/>
-<text xml:space="preserve" text-anchor="middle" x="980" y="-381.32" font-family="Helvetica,sans-Serif" font-size="14.00">POST /jobs/{id}/cancel</text>
-</g>
-<!-- cancel_job&#45;&gt;cancelled -->
-<g id="edge8" class="edge">
-<title>cancel_job&#45;&gt;cancelled</title>
-<path fill="none" stroke="black" stroke-dasharray="5,2" d="M1088.86,-377.65C1088.86,-377.65 1088.86,-63.86 1088.86,-63.86"/>
-<polygon fill="black" stroke="black" points="1092.36,-63.86 1088.86,-53.86 1085.36,-63.86 1092.36,-63.86"/>
-</g>
-<!-- grpc_cancel -->
-<g id="node16" class="node">
-<title>grpc_cancel</title>
-<path fill="none" stroke="black" d="M746.35,-286.5C746.35,-286.5 631.4,-286.5 631.4,-286.5 625.4,-286.5 617.07,-280.97 614.75,-275.44 614.75,-275.44 588.31,-212.56 588.31,-212.56 585.98,-207.03 589.65,-201.5 595.65,-201.5 595.65,-201.5 710.6,-201.5 710.6,-201.5 716.6,-201.5 724.93,-207.03 727.25,-212.56 727.25,-212.56 753.69,-275.44 753.69,-275.44 756.02,-280.97 752.35,-286.5 746.35,-286.5"/>
-<text xml:space="preserve" text-anchor="middle" x="671" y="-247.95" font-family="Helvetica,sans-Serif" font-size="14.00">CancelJob</text>
-<text xml:space="preserve" text-anchor="middle" x="671" y="-230.7" font-family="Helvetica,sans-Serif" font-size="14.00">(unary)</text>
-</g>
-<!-- cancel_job&#45;&gt;grpc_cancel -->
-<g id="edge21" class="edge">
-<title>cancel_job&#45;&gt;grpc_cancel</title>
-<path fill="none" stroke="black" d="M873.76,-376.83C873.76,-350.09 873.76,-274 873.76,-274 873.76,-274 764.98,-274 764.98,-274"/>
-<polygon fill="black" stroke="black" points="764.98,-270.5 754.98,-274 764.98,-277.5 764.98,-270.5"/>
-<text xml:space="preserve" text-anchor="middle" x="870.75" y="-333.25" font-family="Helvetica,sans-Serif" font-size="10.00">via gRPC</text>
-</g>
-<!-- retry_job -->
-<g id="node8" class="node">
-<title>retry_job</title>
-<ellipse fill="none" stroke="black" cx="1260" cy="-386" rx="114.34" ry="18"/>
-<text xml:space="preserve" text-anchor="middle" x="1260" y="-381.32" font-family="Helvetica,sans-Serif" font-size="14.00">POST /jobs/{id}/retry</text>
-</g>
-<!-- retry_job&#45;&gt;pending -->
-<g id="edge9" class="edge">
-<title>retry_job&#45;&gt;pending</title>
-<path fill="none" stroke="black" stroke-dasharray="5,2" d="M1260,-367.66C1260,-330.54 1260,-250 1260,-250 1260,-250 995.86,-250 995.86,-250"/>
-<polygon fill="black" stroke="black" points="995.86,-246.5 985.86,-250 995.86,-253.5 995.86,-246.5"/>
-</g>
-<!-- local -->
-<g id="node10" class="node">
-<title>local</title>
-<path fill="none" stroke="black" d="M316.75,-622C316.75,-622 203.25,-622 203.25,-622 197.25,-622 191.25,-616 191.25,-610 191.25,-610 191.25,-591.5 191.25,-591.5 191.25,-585.5 197.25,-579.5 203.25,-579.5 203.25,-579.5 316.75,-579.5 316.75,-579.5 322.75,-579.5 328.75,-585.5 328.75,-591.5 328.75,-591.5 328.75,-610 328.75,-610 328.75,-616 322.75,-622 316.75,-622"/>
-<text xml:space="preserve" text-anchor="middle" x="260" y="-604.7" font-family="Helvetica,sans-Serif" font-size="14.00">LocalExecutor</text>
-<text xml:space="preserve" text-anchor="middle" x="260" y="-587.45" font-family="Helvetica,sans-Serif" font-size="14.00">Celery + FFmpeg</text>
-</g>
-<!-- executor&#45;&gt;local -->
-<g id="edge11" class="edge">
-<title>executor&#45;&gt;local</title>
-<path fill="none" stroke="black" d="M165.81,-711.81C165.81,-683.47 165.81,-601 165.81,-601 165.81,-601 179.54,-601 179.54,-601"/>
-<polygon fill="black" stroke="black" points="179.54,-604.5 189.54,-601 179.54,-597.5 179.54,-604.5"/>
-<text xml:space="preserve" text-anchor="middle" x="287.88" y="-647.25" font-family="Helvetica,sans-Serif" font-size="10.00">MPR_EXECUTOR=local</text>
-</g>
-<!-- lambda_exec -->
 <g id="node11" class="node">
-<title>lambda_exec</title>
+<title>celery_task</title>
-<path fill="none" stroke="black" d="M136.12,-622C136.12,-622 27.88,-622 27.88,-622 21.88,-622 15.88,-616 15.88,-610 15.88,-610 15.88,-591.5 15.88,-591.5 15.88,-585.5 21.88,-579.5 27.88,-579.5 27.88,-579.5 136.12,-579.5 136.12,-579.5 142.12,-579.5 148.12,-585.5 148.12,-591.5 148.12,-591.5 148.12,-610 148.12,-610 148.12,-616 142.12,-622 136.12,-622"/>
+<path fill="none" stroke="black" d="M162.75,-488C162.75,-488 43.25,-488 43.25,-488 37.25,-488 31.25,-482 31.25,-476 31.25,-476 31.25,-457.5 31.25,-457.5 31.25,-451.5 37.25,-445.5 43.25,-445.5 43.25,-445.5 162.75,-445.5 162.75,-445.5 168.75,-445.5 174.75,-451.5 174.75,-457.5 174.75,-457.5 174.75,-476 174.75,-476 174.75,-482 168.75,-488 162.75,-488"/>
-<text xml:space="preserve" text-anchor="middle" x="82" y="-604.7" font-family="Helvetica,sans-Serif" font-size="14.00">LambdaExecutor</text>
+<text xml:space="preserve" text-anchor="middle" x="103" y="-470.7" font-family="Helvetica,sans-Serif" font-size="14.00">Celery Task</text>
-<text xml:space="preserve" text-anchor="middle" x="82" y="-587.45" font-family="Helvetica,sans-Serif" font-size="14.00">SQS + Lambda</text>
+<text xml:space="preserve" text-anchor="middle" x="103" y="-453.45" font-family="Helvetica,sans-Serif" font-size="14.00">(transcode queue)</text>
 </g>
-<!-- executor&#45;&gt;lambda_exec -->
+<!-- dispatch&#45;&gt;celery_task -->
-<g id="edge12" class="edge">
+<g id="edge11" class="edge">
-<title>executor&#45;&gt;lambda_exec</title>
+<title>dispatch&#45;&gt;celery_task</title>
-<path fill="none" stroke="black" stroke-dasharray="5,2" d="M82.31,-687.36C82.31,-687.36 82.31,-633.77 82.31,-633.77"/>
+<path fill="none" stroke="black" d="M142.89,-552.62C142.89,-552.62 142.89,-499.67 142.89,-499.67"/>
-<polygon fill="black" stroke="black" points="85.81,-633.77 82.31,-623.77 78.81,-633.77 85.81,-633.77"/>
+<polygon fill="black" stroke="black" points="146.39,-499.67 142.89,-489.67 139.39,-499.67 146.39,-499.67"/>
-<text xml:space="preserve" text-anchor="middle" x="121.62" y="-647.25" font-family="Helvetica,sans-Serif" font-size="10.00">MPR_EXECUTOR=lambda</text>
+<text xml:space="preserve" text-anchor="middle" x="131.27" y="-529.4" font-family="Helvetica,sans-Serif" font-size="10.00">local</text>
 </g>
-<!-- transcode -->
+<!-- sfn_start -->
-<g id="node12" class="node">
+<g id="node16" class="node">
-<title>transcode</title>
+<title>sfn_start</title>
-<path fill="none" stroke="black" d="M172.88,-513C172.88,-513 93.12,-513 93.12,-513 87.12,-513 81.12,-507 81.12,-501 81.12,-501 81.12,-482.5 81.12,-482.5 81.12,-476.5 87.12,-470.5 93.12,-470.5 93.12,-470.5 172.88,-470.5 172.88,-470.5 178.88,-470.5 184.88,-476.5 184.88,-482.5 184.88,-482.5 184.88,-501 184.88,-501 184.88,-507 178.88,-513 172.88,-513"/>
+<path fill="none" stroke="black" d="M1525.88,-488C1525.88,-488 1428.12,-488 1428.12,-488 1422.12,-488 1416.12,-482 1416.12,-476 1416.12,-476 1416.12,-457.5 1416.12,-457.5 1416.12,-451.5 1422.12,-445.5 1428.12,-445.5 1428.12,-445.5 1525.88,-445.5 1525.88,-445.5 1531.88,-445.5 1537.88,-451.5 1537.88,-457.5 1537.88,-457.5 1537.88,-476 1537.88,-476 1537.88,-482 1531.88,-488 1525.88,-488"/>
-<text xml:space="preserve" text-anchor="middle" x="133" y="-495.7" font-family="Helvetica,sans-Serif" font-size="14.00">Transcode</text>
+<text xml:space="preserve" text-anchor="middle" x="1477" y="-470.7" font-family="Helvetica,sans-Serif" font-size="14.00">Step Functions</text>
-<text xml:space="preserve" text-anchor="middle" x="133" y="-478.45" font-family="Helvetica,sans-Serif" font-size="14.00">(with preset)</text>
+<text xml:space="preserve" text-anchor="middle" x="1477" y="-453.45" font-family="Helvetica,sans-Serif" font-size="14.00">start_execution</text>
 </g>
-<!-- local&#45;&gt;transcode -->
+<!-- dispatch&#45;&gt;sfn_start -->
-<g id="edge13" class="edge">
-<title>local&#45;&gt;transcode</title>
-<path fill="none" stroke="black" d="M209.38,-579C209.38,-547.27 209.38,-492 209.38,-492 209.38,-492 196.72,-492 196.72,-492"/>
-<polygon fill="black" stroke="black" points="196.72,-488.5 186.72,-492 196.72,-495.5 196.72,-488.5"/>
-</g>
-<!-- trim -->
-<g id="node13" class="node">
-<title>trim</title>
-<path fill="none" stroke="black" d="M372.5,-513C372.5,-513 239.5,-513 239.5,-513 233.5,-513 227.5,-507 227.5,-501 227.5,-501 227.5,-482.5 227.5,-482.5 227.5,-476.5 233.5,-470.5 239.5,-470.5 239.5,-470.5 372.5,-470.5 372.5,-470.5 378.5,-470.5 384.5,-476.5 384.5,-482.5 384.5,-482.5 384.5,-501 384.5,-501 384.5,-507 378.5,-513 372.5,-513"/>
-<text xml:space="preserve" text-anchor="middle" x="306" y="-495.7" font-family="Helvetica,sans-Serif" font-size="14.00">Trim</text>
-<text xml:space="preserve" text-anchor="middle" x="306" y="-478.45" font-family="Helvetica,sans-Serif" font-size="14.00">(&#45;c:v copy &#45;c:a copy)</text>
-</g>
-<!-- local&#45;&gt;trim -->
-<g id="edge14" class="edge">
-<title>local&#45;&gt;trim</title>
-<path fill="none" stroke="black" d="M278.12,-579.22C278.12,-579.22 278.12,-524.75 278.12,-524.75"/>
-<polygon fill="black" stroke="black" points="281.63,-524.75 278.13,-514.75 274.63,-524.75 281.63,-524.75"/>
-</g>
-<!-- progress -->
-<g id="node17" class="node">
-<title>progress</title>
-<polygon fill="none" stroke="black" points="241.5,-407.25 84.5,-407.25 84.5,-364.75 247.5,-364.75 247.5,-401.25 241.5,-407.25"/>
-<polyline fill="none" stroke="black" points="241.5,-407.25 241.5,-401.25"/>
-<polyline fill="none" stroke="black" points="247.5,-401.25 241.5,-401.25"/>
-<text xml:space="preserve" text-anchor="middle" x="166" y="-389.95" font-family="Helvetica,sans-Serif" font-size="14.00">Progress Updates</text>
-<text xml:space="preserve" text-anchor="middle" x="166" y="-372.7" font-family="Helvetica,sans-Serif" font-size="14.00">(gRPC → Redis → DB)</text>
-</g>
-<!-- transcode&#45;&gt;progress -->
-<g id="edge15" class="edge">
-<title>transcode&#45;&gt;progress</title>
-<path fill="none" stroke="black" stroke-dasharray="1,5" d="M134.69,-470.09C134.69,-470.09 134.69,-419.14 134.69,-419.14"/>
-<polygon fill="black" stroke="black" points="138.19,-419.14 134.69,-409.14 131.19,-419.14 138.19,-419.14"/>
-</g>
-<!-- trim&#45;&gt;progress -->
-<g id="edge16" class="edge">
-<title>trim&#45;&gt;progress</title>
-<path fill="none" stroke="black" stroke-dasharray="1,5" d="M237.5,-470.09C237.5,-470.09 237.5,-419.14 237.5,-419.14"/>
-<polygon fill="black" stroke="black" points="241,-419.14 237.5,-409.14 234,-419.14 241,-419.14"/>
-</g>
-<!-- grpc_stream -->
-<g id="node14" class="node">
-<title>grpc_stream</title>
-<path fill="none" stroke="black" d="M304.33,-286.5C304.33,-286.5 89.19,-286.5 89.19,-286.5 83.19,-286.5 73.67,-281.64 70.15,-276.78 70.15,-276.78 22.71,-211.22 22.71,-211.22 19.19,-206.36 21.67,-201.5 27.67,-201.5 27.67,-201.5 242.81,-201.5 242.81,-201.5 248.81,-201.5 258.33,-206.36 261.85,-211.22 261.85,-211.22 309.29,-276.78 309.29,-276.78 312.81,-281.64 310.33,-286.5 304.33,-286.5"/>
-<text xml:space="preserve" text-anchor="middle" x="166" y="-247.95" font-family="Helvetica,sans-Serif" font-size="14.00">StreamProgress</text>
-<text xml:space="preserve" text-anchor="middle" x="166" y="-230.7" font-family="Helvetica,sans-Serif" font-size="14.00">(server streaming)</text>
-</g>
-<!-- grpc_stream&#45;&gt;processing -->
-<g id="edge18" class="edge">
-<title>grpc_stream&#45;&gt;processing</title>
-<path fill="none" stroke="black" stroke-dasharray="1,5" d="M166,-201.1C166,-167.71 166,-127 166,-127 166,-127 770.51,-127 770.51,-127"/>
-<polygon fill="black" stroke="black" points="770.51,-130.5 780.51,-127 770.51,-123.5 770.51,-130.5"/>
-<text xml:space="preserve" text-anchor="middle" x="476.38" y="-170" font-family="Helvetica,sans-Serif" font-size="10.00">update status</text>
-</g>
-<!-- grpc_submit&#45;&gt;pending -->
-<g id="edge20" class="edge">
-<title>grpc_submit&#45;&gt;pending</title>
-<path fill="none" stroke="black" stroke-dasharray="5,2" d="M450,-201.06C450,-186.11 450,-173 450,-173 450,-173 912.08,-173 912.08,-173 912.08,-173 912.08,-214.2 912.08,-214.2"/>
-<polygon fill="black" stroke="black" points="908.58,-214.2 912.08,-224.2 915.58,-214.2 908.58,-214.2"/>
-</g>
-<!-- grpc_cancel&#45;&gt;cancelled -->
-<g id="edge22" class="edge">
-<title>grpc_cancel&#45;&gt;cancelled</title>
-<path fill="none" stroke="black" stroke-dasharray="5,2" d="M728.29,-214C836.93,-214 1062.12,-214 1062.12,-214 1062.12,-214 1062.12,-63.76 1062.12,-63.76"/>
-<polygon fill="black" stroke="black" points="1065.62,-63.76 1062.12,-53.76 1058.62,-63.76 1065.62,-63.76"/>
-</g>
-<!-- progress&#45;&gt;grpc_stream -->
 <g id="edge17" class="edge">
-<title>progress&#45;&gt;grpc_stream</title>
+<title>dispatch&#45;&gt;sfn_start</title>
-<path fill="none" stroke="black" stroke-dasharray="1,5" d="M166,-364.43C166,-364.43 166,-298.49 166,-298.49"/>
+<path fill="none" stroke="black" d="M336.81,-552.63C336.81,-533.84 336.81,-467 336.81,-467 336.81,-467 1404.18,-467 1404.18,-467"/>
-<polygon fill="black" stroke="black" points="169.5,-298.49 166,-288.49 162.5,-298.49 169.5,-298.49"/>
+<polygon fill="black" stroke="black" points="1404.18,-470.5 1414.18,-467 1404.18,-463.5 1404.18,-470.5"/>
-<text xml:space="preserve" text-anchor="middle" x="204.62" y="-333.25" font-family="Helvetica,sans-Serif" font-size="10.00">stream to client</text>
+<text xml:space="preserve" text-anchor="middle" x="809.3" y="-470.25" font-family="Helvetica,sans-Serif" font-size="10.00">lambda</text>
+</g>
+<!-- s3_download -->
+<g id="node12" class="node">
+<title>s3_download</title>
+<path fill="none" stroke="black" d="M144.38,-402.5C144.38,-402.5 61.62,-402.5 61.62,-402.5 55.62,-402.5 49.62,-396.5 49.62,-390.5 49.62,-390.5 49.62,-372 49.62,-372 49.62,-366 55.62,-360 61.62,-360 61.62,-360 144.38,-360 144.38,-360 150.38,-360 156.38,-366 156.38,-372 156.38,-372 156.38,-390.5 156.38,-390.5 156.38,-396.5 150.38,-402.5 144.38,-402.5"/>
+<text xml:space="preserve" text-anchor="middle" x="103" y="-385.2" font-family="Helvetica,sans-Serif" font-size="14.00">S3 Download</text>
+<text xml:space="preserve" text-anchor="middle" x="103" y="-367.95" font-family="Helvetica,sans-Serif" font-size="14.00">(MinIO)</text>
+</g>
+<!-- celery_task&#45;&gt;s3_download -->
+<g id="edge12" class="edge">
+<title>celery_task&#45;&gt;s3_download</title>
+<path fill="none" stroke="black" d="M103,-445.17C103,-445.17 103,-414.33 103,-414.33"/>
+<polygon fill="black" stroke="black" points="106.5,-414.33 103,-404.33 99.5,-414.33 106.5,-414.33"/>
+</g>
+<!-- ffmpeg_local -->
+<g id="node13" class="node">
+<title>ffmpeg_local</title>
+<path fill="none" stroke="black" d="M153,-317C153,-317 59,-317 59,-317 53,-317 47,-311 47,-305 47,-305 47,-286.5 47,-286.5 47,-280.5 53,-274.5 59,-274.5 59,-274.5 153,-274.5 153,-274.5 159,-274.5 165,-280.5 165,-286.5 165,-286.5 165,-305 165,-305 165,-311 159,-317 153,-317"/>
+<text xml:space="preserve" text-anchor="middle" x="106" y="-299.7" font-family="Helvetica,sans-Serif" font-size="14.00">FFmpeg</text>
+<text xml:space="preserve" text-anchor="middle" x="106" y="-282.45" font-family="Helvetica,sans-Serif" font-size="14.00">transcode/trim</text>
+</g>
+<!-- s3_download&#45;&gt;ffmpeg_local -->
+<g id="edge13" class="edge">
+<title>s3_download&#45;&gt;ffmpeg_local</title>
+<path fill="none" stroke="black" d="M103,-359.67C103,-359.67 103,-328.83 103,-328.83"/>
+<polygon fill="black" stroke="black" points="106.5,-328.83 103,-318.83 99.5,-328.83 106.5,-328.83"/>
+</g>
+<!-- s3_upload -->
+<g id="node14" class="node">
+<title>s3_upload</title>
+<path fill="none" stroke="black" d="M138.62,-229.5C138.62,-229.5 75.38,-229.5 75.38,-229.5 69.38,-229.5 63.38,-223.5 63.38,-217.5 63.38,-217.5 63.38,-199 63.38,-199 63.38,-193 69.38,-187 75.38,-187 75.38,-187 138.62,-187 138.62,-187 144.62,-187 150.62,-193 150.62,-199 150.62,-199 150.62,-217.5 150.62,-217.5 150.62,-223.5 144.62,-229.5 138.62,-229.5"/>
+<text xml:space="preserve" text-anchor="middle" x="107" y="-212.2" font-family="Helvetica,sans-Serif" font-size="14.00">S3 Upload</text>
+<text xml:space="preserve" text-anchor="middle" x="107" y="-194.95" font-family="Helvetica,sans-Serif" font-size="14.00">(MinIO)</text>
+</g>
+<!-- ffmpeg_local&#45;&gt;s3_upload -->
+<g id="edge14" class="edge">
+<title>ffmpeg_local&#45;&gt;s3_upload</title>
+<path fill="none" stroke="black" d="M107,-274.12C107,-274.12 107,-241.45 107,-241.45"/>
+<polygon fill="black" stroke="black" points="110.5,-241.45 107,-231.45 103.5,-241.45 110.5,-241.45"/>
+</g>
+<!-- db_update -->
+<g id="node15" class="node">
+<title>db_update</title>
+<path fill="none" stroke="black" d="M180.88,-144C180.88,-144 35.12,-144 35.12,-144 29.12,-144 23.12,-138 23.12,-132 23.12,-132 23.12,-113.5 23.12,-113.5 23.12,-107.5 29.12,-101.5 35.12,-101.5 35.12,-101.5 180.88,-101.5 180.88,-101.5 186.88,-101.5 192.88,-107.5 192.88,-113.5 192.88,-113.5 192.88,-132 192.88,-132 192.88,-138 186.88,-144 180.88,-144"/>
+<text xml:space="preserve" text-anchor="middle" x="108" y="-126.7" font-family="Helvetica,sans-Serif" font-size="14.00">DB Update</text>
+<text xml:space="preserve" text-anchor="middle" x="108" y="-109.45" font-family="Helvetica,sans-Serif" font-size="14.00">(update_job_progress)</text>
+</g>
+<!-- s3_upload&#45;&gt;db_update -->
+<g id="edge15" class="edge">
+<title>s3_upload&#45;&gt;db_update</title>
+<path fill="none" stroke="black" d="M107,-186.67C107,-186.67 107,-155.83 107,-155.83"/>
+<polygon fill="black" stroke="black" points="110.5,-155.83 107,-145.83 103.5,-155.83 110.5,-155.83"/>
+</g>
+<!-- db_update&#45;&gt;completed -->
+<g id="edge16" class="edge">
+<title>db_update&#45;&gt;completed</title>
+<path fill="none" stroke="black" stroke-dasharray="1,5" d="M193.17,-117C345.61,-117 649.29,-117 649.29,-117 649.29,-117 649.29,-43 649.29,-43 649.29,-43 675.4,-43 675.4,-43"/>
+<polygon fill="black" stroke="black" points="675.4,-46.5 685.4,-43 675.4,-39.5 675.4,-46.5"/>
+</g>
+<!-- lambda_fn -->
+<g id="node17" class="node">
+<title>lambda_fn</title>
+<path fill="none" stroke="black" d="M1546,-402.5C1546,-402.5 1428,-402.5 1428,-402.5 1422,-402.5 1416,-396.5 1416,-390.5 1416,-390.5 1416,-372 1416,-372 1416,-366 1422,-360 1428,-360 1428,-360 1546,-360 1546,-360 1552,-360 1558,-366 1558,-372 1558,-372 1558,-390.5 1558,-390.5 1558,-396.5 1552,-402.5 1546,-402.5"/>
+<text xml:space="preserve" text-anchor="middle" x="1487" y="-385.2" font-family="Helvetica,sans-Serif" font-size="14.00">Lambda</text>
+<text xml:space="preserve" text-anchor="middle" x="1487" y="-367.95" font-family="Helvetica,sans-Serif" font-size="14.00">FFmpeg container</text>
+</g>
+<!-- sfn_start&#45;&gt;lambda_fn -->
+<g id="edge18" class="edge">
+<title>sfn_start&#45;&gt;lambda_fn</title>
+<path fill="none" stroke="black" d="M1477,-445.17C1477,-445.17 1477,-414.33 1477,-414.33"/>
+<polygon fill="black" stroke="black" points="1480.5,-414.33 1477,-404.33 1473.5,-414.33 1480.5,-414.33"/>
+</g>
+<!-- s3_dl_aws -->
+<g id="node18" class="node">
+<title>s3_dl_aws</title>
+<path fill="none" stroke="black" d="M1534.38,-317C1534.38,-317 1451.62,-317 1451.62,-317 1445.62,-317 1439.62,-311 1439.62,-305 1439.62,-305 1439.62,-286.5 1439.62,-286.5 1439.62,-280.5 1445.62,-274.5 1451.62,-274.5 1451.62,-274.5 1534.38,-274.5 1534.38,-274.5 1540.38,-274.5 1546.38,-280.5 1546.38,-286.5 1546.38,-286.5 1546.38,-305 1546.38,-305 1546.38,-311 1540.38,-317 1534.38,-317"/>
+<text xml:space="preserve" text-anchor="middle" x="1493" y="-299.7" font-family="Helvetica,sans-Serif" font-size="14.00">S3 Download</text>
+<text xml:space="preserve" text-anchor="middle" x="1493" y="-282.45" font-family="Helvetica,sans-Serif" font-size="14.00">(AWS)</text>
+</g>
+<!-- lambda_fn&#45;&gt;s3_dl_aws -->
+<g id="edge19" class="edge">
+<title>lambda_fn&#45;&gt;s3_dl_aws</title>
+<path fill="none" stroke="black" d="M1493,-359.67C1493,-359.67 1493,-328.83 1493,-328.83"/>
+<polygon fill="black" stroke="black" points="1496.5,-328.83 1493,-318.83 1489.5,-328.83 1496.5,-328.83"/>
+</g>
+<!-- ffmpeg_aws -->
+<g id="node19" class="node">
+<title>ffmpeg_aws</title>
+<path fill="none" stroke="black" d="M1545,-229.5C1545,-229.5 1451,-229.5 1451,-229.5 1445,-229.5 1439,-223.5 1439,-217.5 1439,-217.5 1439,-199 1439,-199 1439,-193 1445,-187 1451,-187 1451,-187 1545,-187 1545,-187 1551,-187 1557,-193 1557,-199 1557,-199 1557,-217.5 1557,-217.5 1557,-223.5 1551,-229.5 1545,-229.5"/>
+<text xml:space="preserve" text-anchor="middle" x="1498" y="-212.2" font-family="Helvetica,sans-Serif" font-size="14.00">FFmpeg</text>
+<text xml:space="preserve" text-anchor="middle" x="1498" y="-194.95" font-family="Helvetica,sans-Serif" font-size="14.00">transcode/trim</text>
+</g>
+<!-- s3_dl_aws&#45;&gt;ffmpeg_aws -->
+<g id="edge20" class="edge">
+<title>s3_dl_aws&#45;&gt;ffmpeg_aws</title>
+<path fill="none" stroke="black" d="M1493,-274.12C1493,-274.12 1493,-241.45 1493,-241.45"/>
+<polygon fill="black" stroke="black" points="1496.5,-241.45 1493,-231.45 1489.5,-241.45 1496.5,-241.45"/>
+</g>
+<!-- s3_ul_aws -->
+<g id="node20" class="node">
+<title>s3_ul_aws</title>
+<path fill="none" stroke="black" d="M1532.62,-144C1532.62,-144 1469.38,-144 1469.38,-144 1463.38,-144 1457.38,-138 1457.38,-132 1457.38,-132 1457.38,-113.5 1457.38,-113.5 1457.38,-107.5 1463.38,-101.5 1469.38,-101.5 1469.38,-101.5 1532.62,-101.5 1532.62,-101.5 1538.62,-101.5 1544.62,-107.5 1544.62,-113.5 1544.62,-113.5 1544.62,-132 1544.62,-132 1544.62,-138 1538.62,-144 1532.62,-144"/>
+<text xml:space="preserve" text-anchor="middle" x="1501" y="-126.7" font-family="Helvetica,sans-Serif" font-size="14.00">S3 Upload</text>
+<text xml:space="preserve" text-anchor="middle" x="1501" y="-109.45" font-family="Helvetica,sans-Serif" font-size="14.00">(AWS)</text>
+</g>
+<!-- ffmpeg_aws&#45;&gt;s3_ul_aws -->
+<g id="edge21" class="edge">
+<title>ffmpeg_aws&#45;&gt;s3_ul_aws</title>
+<path fill="none" stroke="black" d="M1501,-186.67C1501,-186.67 1501,-155.83 1501,-155.83"/>
+<polygon fill="black" stroke="black" points="1504.5,-155.83 1501,-145.83 1497.5,-155.83 1504.5,-155.83"/>
+</g>
+<!-- callback -->
+<g id="node21" class="node">
+<title>callback</title>
+<path fill="none" stroke="black" d="M1585.12,-58.5C1585.12,-58.5 1422.88,-58.5 1422.88,-58.5 1416.88,-58.5 1410.88,-52.5 1410.88,-46.5 1410.88,-46.5 1410.88,-28 1410.88,-28 1410.88,-22 1416.88,-16 1422.88,-16 1422.88,-16 1585.12,-16 1585.12,-16 1591.12,-16 1597.12,-22 1597.12,-28 1597.12,-28 1597.12,-46.5 1597.12,-46.5 1597.12,-52.5 1591.12,-58.5 1585.12,-58.5"/>
+<text xml:space="preserve" text-anchor="middle" x="1504" y="-41.2" font-family="Helvetica,sans-Serif" font-size="14.00">HTTP Callback</text>
+<text xml:space="preserve" text-anchor="middle" x="1504" y="-23.95" font-family="Helvetica,sans-Serif" font-size="14.00">POST /jobs/{id}/callback</text>
+</g>
+<!-- s3_ul_aws&#45;&gt;callback -->
+<g id="edge22" class="edge">
+<title>s3_ul_aws&#45;&gt;callback</title>
+<path fill="none" stroke="black" d="M1501,-101.17C1501,-101.17 1501,-70.33 1501,-70.33"/>
+<polygon fill="black" stroke="black" points="1504.5,-70.33 1501,-60.33 1497.5,-70.33 1504.5,-70.33"/>
+</g>
+<!-- callback&#45;&gt;completed -->
+<g id="edge23" class="edge">
+<title>callback&#45;&gt;completed</title>
+<path fill="none" stroke="black" stroke-dasharray="1,5" d="M1427.5,-58.88C1427.5,-69.48 1427.5,-80 1427.5,-80 1427.5,-80 786.08,-80 786.08,-80 786.08,-80 786.08,-67.14 786.08,-67.14"/>
+<polygon fill="black" stroke="black" points="789.58,-67.14 786.08,-57.14 782.58,-67.14 789.58,-67.14"/>
 </g>
 </g>
 </svg>

docs/architecture/index.html

@@ -1,14 +1,17 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="en">
     <head>
-    <meta charset="UTF-8">
+        <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <title>MPR - Architecture</title>
-    <link rel="stylesheet" href="styles.css">
+        <link rel="stylesheet" href="styles.css" />
     </head>
     <body>
         <h1>MPR - Media Processor</h1>
-    <p>A web-based media transcoding tool with professional architecture.</p>
+        <p>
+            Media transcoding platform with dual execution modes: local (Celery
+            + MinIO) and cloud (AWS Step Functions + Lambda + S3).
+        </p>
 
         <nav>
             <a href="#overview">System Overview</a>
@@ -21,20 +24,42 @@
             <div class="diagram">
                 <h3>Architecture</h3>
                 <object type="image/svg+xml" data="01-system-overview.svg">
-                <img src="01-system-overview.svg" alt="System Overview">
+                    <img src="01-system-overview.svg" alt="System Overview" />
                 </object>
-            <a href="01-system-overview.svg" target="_blank">Open full size</a>
+                <a href="01-system-overview.svg" target="_blank"
+                    >Open full size</a
+                >
             </div>
         </div>
 
         <div class="legend">
             <h3>Components</h3>
             <ul>
-            <li><span class="color-box" style="background: #e8f4f8"></span> Reverse Proxy (nginx)</li>
+                <li>
-            <li><span class="color-box" style="background: #f0f8e8"></span> Application Layer (Django, FastAPI, UI)</li>
+                    <span class="color-box" style="background: #e8f4f8"></span>
-            <li><span class="color-box" style="background: #fff8e8"></span> Worker Layer (Celery, Lambda)</li>
+                    Reverse Proxy (nginx)
-            <li><span class="color-box" style="background: #f8e8f0"></span> Data Layer (PostgreSQL, Redis, SQS)</li>
+                </li>
-            <li><span class="color-box" style="background: #f0f0f0"></span> Storage (Local FS, S3)</li>
+                <li>
+                    <span class="color-box" style="background: #f0f8e8"></span>
+                    Application Layer (Django Admin, FastAPI + GraphQL, Timeline
+                    UI)
+                </li>
+                <li>
+                    <span class="color-box" style="background: #fff8e8"></span>
+                    Worker Layer (Celery local mode)
+                </li>
+                <li>
+                    <span class="color-box" style="background: #fde8d0"></span>
+                    AWS (Step Functions, Lambda - cloud mode)
+                </li>
+                <li>
+                    <span class="color-box" style="background: #f8e8f0"></span>
+                    Data Layer (PostgreSQL, Redis)
+                </li>
+                <li>
+                    <span class="color-box" style="background: #f0f0f0"></span>
+                    S3 Storage (MinIO local / AWS S3 cloud)
+                </li>
             </ul>
         </div>
 
@@ -43,7 +68,7 @@
             <div class="diagram">
                 <h3>Entity Relationships</h3>
                 <object type="image/svg+xml" data="02-data-model.svg">
-                <img src="02-data-model.svg" alt="Data Model">
+                    <img src="02-data-model.svg" alt="Data Model" />
                 </object>
                 <a href="02-data-model.svg" target="_blank">Open full size</a>
             </div>
@@ -52,9 +77,19 @@
         <div class="legend">
             <h3>Entities</h3>
             <ul>
-            <li><span class="color-box" style="background: #4a90d9"></span> MediaAsset - Video/audio files with metadata</li>
+                <li>
-            <li><span class="color-box" style="background: #50b050"></span> TranscodePreset - Encoding configurations</li>
+                    <span class="color-box" style="background: #4a90d9"></span>
-            <li><span class="color-box" style="background: #d9534f"></span> TranscodeJob - Processing queue items</li>
+                    MediaAsset - Video/audio files (S3 keys as paths)
+                </li>
+                <li>
+                    <span class="color-box" style="background: #50b050"></span>
+                    TranscodePreset - Encoding configurations
+                </li>
+                <li>
+                    <span class="color-box" style="background: #d9534f"></span>
+                    TranscodeJob - Processing queue (celery_task_id or
+                    execution_arn)
+                </li>
             </ul>
         </div>
 
@@ -63,7 +98,7 @@
             <div class="diagram">
                 <h3>Job Lifecycle</h3>
                 <object type="image/svg+xml" data="03-job-flow.svg">
-                <img src="03-job-flow.svg" alt="Job Flow">
+                    <img src="03-job-flow.svg" alt="Job Flow" />
                 </object>
                 <a href="03-job-flow.svg" target="_blank">Open full size</a>
             </div>
@@ -72,30 +107,71 @@
         <div class="legend">
             <h3>Job States</h3>
             <ul>
-            <li><span class="color-box" style="background: #ffc107"></span> PENDING - Waiting in queue</li>
+                <li>
-            <li><span class="color-box" style="background: #17a2b8"></span> PROCESSING - Worker executing</li>
+                    <span class="color-box" style="background: #ffc107"></span>
-            <li><span class="color-box" style="background: #28a745"></span> COMPLETED - Success</li>
+                    PENDING - Waiting in queue
-            <li><span class="color-box" style="background: #dc3545"></span> FAILED - Error occurred</li>
+                </li>
-            <li><span class="color-box" style="background: #6c757d"></span> CANCELLED - User cancelled</li>
+                <li>
+                    <span class="color-box" style="background: #17a2b8"></span>
+                    PROCESSING - Worker executing
+                </li>
+                <li>
+                    <span class="color-box" style="background: #28a745"></span>
+                    COMPLETED - Success
+                </li>
+                <li>
+                    <span class="color-box" style="background: #dc3545"></span>
+                    FAILED - Error occurred
+                </li>
+                <li>
+                    <span class="color-box" style="background: #6c757d"></span>
+                    CANCELLED - User cancelled
+                </li>
+            </ul>
+            <h3>Execution Modes</h3>
+            <ul>
+                <li>
+                    <span class="color-box" style="background: #e8f4e8"></span>
+                    Local: Celery + MinIO (S3 API) + FFmpeg
+                </li>
+                <li>
+                    <span class="color-box" style="background: #fde8d0"></span>
+                    Lambda: Step Functions + Lambda + AWS S3
+                </li>
             </ul>
         </div>
 
-    <h2>Quick Reference</h2>
+        <h2>API Interfaces</h2>
-    <pre><code># Generate SVGs from DOT files
+        <pre><code># REST API
-dot -Tsvg 01-system-overview.dot -o 01-system-overview.svg
+http://mpr.local.ar/api/docs     - Swagger UI
-dot -Tsvg 02-data-model.dot -o 02-data-model.svg
+POST /api/assets/scan             - Scan S3 bucket for media
-dot -Tsvg 03-job-flow.dot -o 03-job-flow.svg
+POST /api/jobs/                   - Create transcode job
+POST /api/jobs/{id}/callback      - Lambda completion callback
 
-# Or generate all at once
+# GraphQL (GraphiQL)
-for f in *.dot; do dot -Tsvg "$f" -o "${f%.dot}.svg"; done</code></pre>
+http://mpr.local.ar/graphql       - GraphiQL IDE
+query { assets { id filename } }
+mutation { createJob(input: {...}) { id status } }
+mutation { scanMediaFolder { found registered } }</code></pre>
 
         <h2>Access Points</h2>
-    <pre><code># Add to /etc/hosts
+        <pre><code># Local development
 127.0.0.1 mpr.local.ar
-
-# URLs
 http://mpr.local.ar/admin         - Django Admin
-http://mpr.local.ar/api    - FastAPI (docs at /api/docs)
+http://mpr.local.ar/api/docs      - FastAPI Swagger
-http://mpr.local.ar/ui     - Timeline UI</code></pre>
+http://mpr.local.ar/graphql       - GraphiQL
+http://mpr.local.ar/              - Timeline UI
+http://localhost:9001              - MinIO Console
+
+# AWS deployment
+https://mpr.mcrn.ar/              - Production</code></pre>
+
+        <h2>Quick Reference</h2>
+        <pre><code># Render SVGs from DOT files
+for f in *.dot; do dot -Tsvg "$f" -o "${f%.dot}.svg"; done
+
+# Switch executor mode
+MPR_EXECUTOR=local    # Celery + MinIO
+MPR_EXECUTOR=lambda   # Step Functions + Lambda + S3</code></pre>
     </body>
 </html>

docs/media-storage.md

@@ -2,147 +2,119 @@
 
 ## Overview
 
-MPR separates media into **input** and **output** paths, each independently configurable. File paths are stored **relative to their respective root** to ensure portability between local development and cloud deployments (AWS S3, etc.).
+MPR uses **S3-compatible storage** everywhere. Locally via MinIO, in production via AWS S3. The same boto3 code and S3 keys work in both environments - the only difference is the `S3_ENDPOINT_URL` env var.
 
 ## Storage Strategy
 
-### Input / Output Separation
+### S3 Buckets
 
-| Path | Env Var | Purpose |
+| Bucket | Env Var | Purpose |
-|------|---------|---------|
+|--------|---------|---------|
-| `MEDIA_IN` | `/app/media/in` | Source media files to process |
+| `mpr-media-in` | `S3_BUCKET_IN` | Source media files |
-| `MEDIA_OUT` | `/app/media/out` | Transcoded/trimmed output files |
+| `mpr-media-out` | `S3_BUCKET_OUT` | Transcoded/trimmed output |
 
-These can point to different locations or even different servers/buckets in production.
+### S3 Keys as File Paths
+- **Database**: Stores S3 object keys (e.g., `video1.mp4`, `subfolder/video3.mp4`)
+- **Local dev**: MinIO serves these via S3 API on port 9000
+- **AWS**: Real S3, same keys, different endpoint
 
-### File Path Storage
+### Why S3 Everywhere?
-- **Database**: Stores only the relative path (e.g., `videos/sample.mp4`)
+1. **Identical code paths** - no branching between local and cloud
-- **Input Root**: Configurable via `MEDIA_IN` env var
+2. **Seamless executor switching** - Celery and Lambda both use boto3
-- **Output Root**: Configurable via `MEDIA_OUT` env var
+3. **Cloud-native** - ready for production without refactoring
-- **Serving**: Base URL configurable via `MEDIA_BASE_URL` env var
 
-### Why Relative Paths?
+## Local Development (MinIO)
-1. **Portability**: Same database works locally and in cloud
-2. **Flexibility**: Easy to switch between storage backends
-3. **Simplicity**: No need to update paths when migrating
-
-## Local Development
 
 ### Configuration
 ```bash
-MEDIA_IN=/app/media/in
+S3_ENDPOINT_URL=http://minio:9000
-MEDIA_OUT=/app/media/out
+S3_BUCKET_IN=mpr-media-in
+S3_BUCKET_OUT=mpr-media-out
+AWS_ACCESS_KEY_ID=minioadmin
+AWS_SECRET_ACCESS_KEY=minioadmin
 ```
 
-### File Structure
+### How It Works
-```
+- MinIO runs as a Docker container (port 9000 API, port 9001 console)
-/app/media/
+- `minio-init` container creates buckets and sets public read access on startup
-├── in/                    # Source files
+- Nginx proxies `/media/in/` and `/media/out/` to MinIO buckets
-│   ├── video1.mp4
+- Upload files via MinIO Console (http://localhost:9001) or `mc` CLI
-│   ├── video2.mp4
-│   └── subfolder/
-│       └── video3.mp4
-└── out/                   # Transcoded output
-    ├── video1_h264.mp4
-    └── video2_trimmed.mp4
-```
 
-### Database Storage
+### Upload Files to MinIO
-```
-# Source assets (scanned from media/in)
-filename: video1.mp4
-file_path: video1.mp4
-
-filename: video3.mp4
-file_path: subfolder/video3.mp4
-```
-
-### URL Serving
-- Nginx serves input via `location /media/in { alias /app/media/in; }`
-- Nginx serves output via `location /media/out { alias /app/media/out; }`
-- Frontend accesses: `http://mpr.local.ar/media/in/video1.mp4`
-- Video player: `<video src="/media/in/video1.mp4" />`
-
-## AWS/Cloud Deployment
-
-### S3 Configuration
 ```bash
-# Input and output can be different buckets/paths
+# Using mc CLI
-MEDIA_IN=s3://source-bucket/media/
+mc alias set local http://localhost:9000 minioadmin minioadmin
-MEDIA_OUT=s3://output-bucket/transcoded/
+mc cp video.mp4 local/mpr-media-in/
-MEDIA_BASE_URL=https://source-bucket.s3.amazonaws.com/media/
+
+# Using aws CLI with endpoint override
+aws --endpoint-url http://localhost:9000 s3 cp video.mp4 s3://mpr-media-in/
 ```
 
-### S3 Structure
+## AWS Production (S3)
-```
-s3://source-bucket/media/
-├── video1.mp4
-└── subfolder/
-    └── video3.mp4
 
-s3://output-bucket/transcoded/
+### Configuration
-├── video1_h264.mp4
+```bash
-└── video2_trimmed.mp4
+# No S3_ENDPOINT_URL = uses real AWS S3
+S3_BUCKET_IN=mpr-media-in
+S3_BUCKET_OUT=mpr-media-out
+AWS_REGION=us-east-1
+AWS_ACCESS_KEY_ID=<real-key>
+AWS_SECRET_ACCESS_KEY=<real-secret>
 ```
 
-### Database Storage (Same!)
+### Upload Files to S3
+```bash
+aws s3 cp video.mp4 s3://mpr-media-in/
+aws s3 sync /local/media/ s3://mpr-media-in/
 ```
-filename: video1.mp4
-file_path: video1.mp4
 
-filename: video3.mp4
+## Storage Module
-file_path: subfolder/video3.mp4
+
+`core/storage.py` provides all S3 operations:
+
+```python
+from core.storage import (
+    get_s3_client,     # boto3 client (MinIO or AWS)
+    list_objects,      # List bucket contents, filter by extension
+    download_file,     # Download S3 object to local path
+    download_to_temp,  # Download to temp file (caller cleans up)
+    upload_file,       # Upload local file to S3
+    get_presigned_url, # Generate presigned URL
+    BUCKET_IN,         # Input bucket name
+    BUCKET_OUT,        # Output bucket name
+)
 ```
 
 ## API Endpoints
 
-### Scan Media Folder
+### Scan Media (REST)
 ```http
 POST /api/assets/scan
 ```
+Lists objects in `S3_BUCKET_IN`, registers new media files.
 
-**Behavior:**
+### Scan Media (GraphQL)
-1. Recursively scans `MEDIA_IN` directory
+```graphql
-2. Finds all video/audio files (mp4, mkv, avi, mov, mp3, wav, etc.)
+mutation { scanMediaFolder { found registered skipped files } }
-3. Stores paths **relative to MEDIA_IN**
-4. Skips already-registered files (by filename)
-5. Returns summary: `{ found, registered, skipped, files }`
-
-### Create Job
-```http
-POST /api/jobs/
-Content-Type: application/json
-
-{
-  "source_asset_id": "uuid",
-  "preset_id": "uuid",
-  "trim_start": 10.0,
-  "trim_end": 30.0
-}
 ```
 
-**Behavior:**
+## Job Flow with S3
-- Server sets `output_path` using `MEDIA_OUT` + generated filename
-- Output goes to the output directory, not alongside source files
 
-## Migration Guide
+### Local Mode (Celery)
+1. Celery task receives `source_key` and `output_key`
+2. Downloads source from `S3_BUCKET_IN` to temp file
+3. Runs FFmpeg locally
+4. Uploads result to `S3_BUCKET_OUT`
+5. Cleans up temp files
 
-### Moving from Local to S3
+### Lambda Mode (AWS)
+1. Step Functions invokes Lambda with S3 keys
+2. Lambda downloads source from `S3_BUCKET_IN` to `/tmp`
+3. Runs FFmpeg in container
+4. Uploads result to `S3_BUCKET_OUT`
+5. Calls back to API with result
 
-1. **Upload source files to S3:**
+Both paths use the same S3 buckets and key structure.
-   ```bash
-   aws s3 sync /app/media/in/ s3://source-bucket/media/
-   aws s3 sync /app/media/out/ s3://output-bucket/transcoded/
-   ```
-
-2. **Update environment variables:**
-   ```bash
-   MEDIA_IN=s3://source-bucket/media/
-   MEDIA_OUT=s3://output-bucket/transcoded/
-   MEDIA_BASE_URL=https://source-bucket.s3.amazonaws.com/media/
-   ```
-
-3. **Database paths remain unchanged** (already relative)
 
 ## Supported File Types
 

modelgen/generator/__init__.py

@@ -13,6 +13,7 @@ from typing import Dict, Type
 
 from .base import BaseGenerator
 from .django import DjangoGenerator
+from .graphene import GrapheneGenerator
 from .prisma import PrismaGenerator
 from .protobuf import ProtobufGenerator
 from .pydantic import PydanticGenerator
@@ -27,12 +28,14 @@ GENERATORS: Dict[str, Type[BaseGenerator]] = {
     "protobuf": ProtobufGenerator,
     "proto": ProtobufGenerator,  # Alias
     "prisma": PrismaGenerator,
+    "graphene": GrapheneGenerator,
 }
 
 __all__ = [
     "BaseGenerator",
     "PydanticGenerator",
     "DjangoGenerator",
+    "GrapheneGenerator",
     "TypeScriptGenerator",
     "ProtobufGenerator",
     "PrismaGenerator",

modelgen/generator/graphene.py

@@ -0,0 +1,236 @@
+"""
+Graphene Generator
+
+Generates graphene ObjectType and InputObjectType classes from model definitions.
+Only generates type definitions — queries, mutations, and resolvers are hand-written.
+"""
+
+from enum import Enum
+from pathlib import Path
+from typing import Any, List, get_type_hints
+
+from ..helpers import get_origin_name, get_type_name, unwrap_optional
+from ..loader.schema import EnumDefinition, FieldDefinition, ModelDefinition
+from ..types import GRAPHENE_RESOLVERS
+from .base import BaseGenerator
+
+
+class GrapheneGenerator(BaseGenerator):
+    """Generates graphene type definition files."""
+
+    def file_extension(self) -> str:
+        return ".py"
+
+    def generate(self, models, output_path: Path) -> None:
+        """Generate graphene types to output_path."""
+        output_path.parent.mkdir(parents=True, exist_ok=True)
+
+        if hasattr(models, "models"):
+            # SchemaLoader
+            content = self._generate_from_definitions(
+                models.models,
+                getattr(models, "enums", []),
+                getattr(models, "api_models", []),
+            )
+        elif isinstance(models, tuple):
+            content = self._generate_from_definitions(models[0], models[1], [])
+        elif isinstance(models, list):
+            content = self._generate_from_dataclasses(models)
+        else:
+            raise ValueError(f"Unsupported input type: {type(models)}")
+
+        output_path.write_text(content)
+
+    def _generate_from_definitions(
+        self,
+        models: List[ModelDefinition],
+        enums: List[EnumDefinition],
+        api_models: List[ModelDefinition],
+    ) -> str:
+        """Generate from ModelDefinition objects."""
+        lines = self._generate_header()
+
+        # Generate enums as graphene.Enum
+        for enum_def in enums:
+            lines.extend(self._generate_enum(enum_def))
+            lines.append("")
+            lines.append("")
+
+        # Generate domain models as ObjectType
+        for model_def in models:
+            lines.extend(self._generate_object_type(model_def))
+            lines.append("")
+            lines.append("")
+
+        # Generate API models — request types as InputObjectType, others as ObjectType
+        for model_def in api_models:
+            if model_def.name.endswith("Request"):
+                lines.extend(self._generate_input_type(model_def))
+            else:
+                lines.extend(self._generate_object_type(model_def))
+            lines.append("")
+            lines.append("")
+
+        return "\n".join(lines).rstrip() + "\n"
+
+    def _generate_from_dataclasses(self, dataclasses: List[type]) -> str:
+        """Generate from Python dataclasses."""
+        lines = self._generate_header()
+
+        enums_generated = set()
+        for cls in dataclasses:
+            hints = get_type_hints(cls)
+            for type_hint in hints.values():
+                base, _ = unwrap_optional(type_hint)
+                if isinstance(base, type) and issubclass(base, Enum):
+                    if base.__name__ not in enums_generated:
+                        lines.extend(self._generate_enum_from_python(base))
+                        lines.append("")
+                        lines.append("")
+                        enums_generated.add(base.__name__)
+
+        for cls in dataclasses:
+            lines.extend(self._generate_object_type_from_dataclass(cls))
+            lines.append("")
+            lines.append("")
+
+        return "\n".join(lines).rstrip() + "\n"
+
+    def _generate_header(self) -> List[str]:
+        return [
+            '"""',
+            "Graphene Types - GENERATED FILE",
+            "",
+            "Do not edit directly. Regenerate using modelgen.",
+            '"""',
+            "",
+            "import graphene",
+            "",
+            "",
+        ]
+
+    def _generate_enum(self, enum_def: EnumDefinition) -> List[str]:
+        """Generate graphene.Enum from EnumDefinition."""
+        lines = [f"class {enum_def.name}(graphene.Enum):"]
+        for name, value in enum_def.values:
+            lines.append(f'    {name} = "{value}"')
+        return lines
+
+    def _generate_enum_from_python(self, enum_cls: type) -> List[str]:
+        """Generate graphene.Enum from Python Enum."""
+        lines = [f"class {enum_cls.__name__}(graphene.Enum):"]
+        for member in enum_cls:
+            lines.append(f'    {member.name} = "{member.value}"')
+        return lines
+
+    def _generate_object_type(self, model_def: ModelDefinition) -> List[str]:
+        """Generate graphene.ObjectType from ModelDefinition."""
+        name = model_def.name
+        # Append Type suffix if not already present
+        type_name = f"{name}Type" if not name.endswith("Type") else name
+
+        lines = [f"class {type_name}(graphene.ObjectType):"]
+        if model_def.docstring:
+            doc = model_def.docstring.strip().split("\n")[0]
+            lines.append(f'    """{doc}"""')
+            lines.append("")
+
+        if not model_def.fields:
+            lines.append("    pass")
+        else:
+            for field in model_def.fields:
+                graphene_type = self._resolve_type(field.type_hint, field.optional)
+                lines.append(f"    {field.name} = {graphene_type}")
+
+        return lines
+
+    def _generate_input_type(self, model_def: ModelDefinition) -> List[str]:
+        """Generate graphene.InputObjectType from ModelDefinition."""
+        import dataclasses as dc
+
+        name = model_def.name
+        # Convert FooRequest -> FooInput
+        if name.endswith("Request"):
+            input_name = name[: -len("Request")] + "Input"
+        else:
+            input_name = f"{name}Input"
+
+        lines = [f"class {input_name}(graphene.InputObjectType):"]
+        if model_def.docstring:
+            doc = model_def.docstring.strip().split("\n")[0]
+            lines.append(f'    """{doc}"""')
+            lines.append("")
+
+        if not model_def.fields:
+            lines.append("    pass")
+        else:
+            for field in model_def.fields:
+                graphene_type = self._resolve_type(field.type_hint, field.optional)
+                # Required only if not optional AND no default value
+                has_default = field.default is not dc.MISSING
+                if not field.optional and not has_default:
+                    graphene_type = self._make_required(graphene_type)
+                elif has_default and not field.optional:
+                    graphene_type = self._add_default(graphene_type, field.default)
+                lines.append(f"    {field.name} = {graphene_type}")
+
+        return lines
+
+    def _generate_object_type_from_dataclass(self, cls: type) -> List[str]:
+        """Generate graphene.ObjectType from a dataclass."""
+        import dataclasses as dc
+
+        type_name = f"{cls.__name__}Type"
+        lines = [f"class {type_name}(graphene.ObjectType):"]
+
+        hints = get_type_hints(cls)
+        for name, type_hint in hints.items():
+            if name.startswith("_"):
+                continue
+            graphene_type = self._resolve_type(type_hint, False)
+            lines.append(f"    {name} = {graphene_type}")
+
+        return lines
+
+    def _resolve_type(self, type_hint: Any, optional: bool) -> str:
+        """Resolve Python type to graphene field call string."""
+        base, is_optional = unwrap_optional(type_hint)
+        optional = optional or is_optional
+        origin = get_origin_name(base)
+        type_name = get_type_name(base)
+
+        # Look up resolver
+        resolver = (
+            GRAPHENE_RESOLVERS.get(origin)
+            or GRAPHENE_RESOLVERS.get(type_name)
+            or GRAPHENE_RESOLVERS.get(base)
+            or (
+                GRAPHENE_RESOLVERS["enum"]
+                if isinstance(base, type) and issubclass(base, Enum)
+                else None
+            )
+        )
+
+        result = resolver(base) if resolver else "graphene.String"
+
+        # List types already have () syntax from resolver
+        if result.startswith("graphene.List("):
+            return result
+
+        # Scalar types: add () call
+        return f"{result}()"
+
+    def _make_required(self, field_str: str) -> str:
+        """Add required=True to a graphene field."""
+        if field_str.endswith("()"):
+            return field_str[:-1] + "required=True)"
+        return field_str
+
+    def _add_default(self, field_str: str, default: Any) -> str:
+        """Add default_value to a graphene field."""
+        if callable(default):
+            # default_factory — skip, graphene doesn't support factories
+            return field_str
+        if field_str.endswith("()"):
+            return field_str[:-1] + f"default_value={default!r})"
+        return field_str

modelgen/types.py

@@ -137,3 +137,36 @@ PRISMA_SPECIAL: dict[str, str] = {
     "created_at": "DateTime @default(now())",
     "updated_at": "DateTime @updatedAt",
 }
+
+# =============================================================================
+# Graphene Type Resolvers
+# =============================================================================
+
+
+def _resolve_graphene_list(base: Any) -> str:
+    """Resolve graphene List type."""
+    args = get_args(base)
+    if args:
+        inner = args[0]
+        if inner is str:
+            return "graphene.List(graphene.String)"
+        elif inner is int:
+            return "graphene.List(graphene.Int)"
+        elif inner is float:
+            return "graphene.List(graphene.Float)"
+        elif inner is bool:
+            return "graphene.List(graphene.Boolean)"
+    return "graphene.List(graphene.String)"
+
+
+GRAPHENE_RESOLVERS: dict[Any, Callable[[Any], str]] = {
+    str: lambda _: "graphene.String",
+    int: lambda _: "graphene.Int",
+    float: lambda _: "graphene.Float",
+    bool: lambda _: "graphene.Boolean",
+    "UUID": lambda _: "graphene.UUID",
+    "datetime": lambda _: "graphene.DateTime",
+    "dict": lambda _: "graphene.JSONString",
+    "list": _resolve_graphene_list,
+    "enum": lambda base: f"graphene.String",  # Enums exposed as strings in GQL
+}

mpr/media_assets/models.py

@@ -96,6 +96,7 @@ class TranscodeJob(models.Model):
     speed = models.CharField(max_length=255, null=True, blank=True)
     error_message = models.TextField(blank=True, default='')
     celery_task_id = models.CharField(max_length=255, null=True, blank=True)
+    execution_arn = models.CharField(max_length=255, null=True, blank=True)
     priority = models.IntegerField(default=0)
     created_at = models.DateTimeField(auto_now_add=True)
     started_at = models.DateTimeField(null=True, blank=True)

requirements.txt

@@ -19,6 +19,13 @@ ffmpeg-python>=0.2.0
 grpcio>=1.60.0
 grpcio-tools>=1.60.0
 
+# AWS
+boto3>=1.34.0
+
+# GraphQL
+graphene>=3.3
+starlette-graphene3>=0.6.0
+
 # Testing
 pytest>=7.4.0
 pytest-django>=4.7.0

schema/models/__init__.py

@@ -5,7 +5,7 @@ This module exports all dataclasses, enums, and constants that the generator
 should process. Add new models here to have them included in generation.
 """
 
-from .api import CreateJobRequest, SystemStatus
+from .api import CreateJobRequest, ScanResult, SystemStatus
 from .grpc import (
     GRPC_SERVICE,
     CancelRequest,
@@ -26,7 +26,7 @@ DATACLASSES = [MediaAsset, TranscodePreset, TranscodeJob]
 
 # API request/response models - generates TypeScript only (no Django)
 # WorkerStatus from grpc.py is reused here
-API_MODELS = [CreateJobRequest, SystemStatus, WorkerStatus]
+API_MODELS = [CreateJobRequest, SystemStatus, ScanResult, WorkerStatus]
 
 # Status enums - included in generated code
 ENUMS = [AssetStatus, JobStatus]
@@ -50,6 +50,7 @@ __all__ = [
     "TranscodeJob",
     # API Models
     "CreateJobRequest",
+    "ScanResult",
     "SystemStatus",
     # Enums
     "AssetStatus",

schema/models/api.py

@@ -5,8 +5,8 @@ These are separate from the main domain models and represent
 the shape of data sent to/from the API endpoints.
 """
 
-from dataclasses import dataclass
+from dataclasses import dataclass, field
-from typing import Optional
+from typing import List, Optional
 from uuid import UUID
 
 
@@ -19,6 +19,7 @@ class CreateJobRequest:
     trim_start: Optional[float] = None  # seconds
     trim_end: Optional[float] = None  # seconds
     output_filename: Optional[str] = None
+    priority: int = 0
 
 
 @dataclass
@@ -29,4 +30,14 @@ class SystemStatus:
     version: str
 
 
+@dataclass
+class ScanResult:
+    """Result of scanning the media input bucket."""
+
+    found: int = 0
+    registered: int = 0
+    skipped: int = 0
+    files: List[str] = field(default_factory=list)
+
+
 # Note: WorkerStatus is defined in grpc.py and reused here

schema/models/jobs.py

@@ -63,6 +63,7 @@ class TranscodeJob:
 
     # Worker tracking
     celery_task_id: Optional[str] = None
+    execution_arn: Optional[str] = None  # AWS Step Functions execution ARN
     priority: int = 0  # Lower = higher priority
 
     # Timestamps

task/executor.py

@@ -110,7 +110,16 @@ class LocalExecutor(Executor):
 
 
 class LambdaExecutor(Executor):
-    """Execute jobs via AWS Lambda (future implementation)."""
+    """Execute jobs via AWS Step Functions + Lambda."""
+
+    def __init__(self):
+        import boto3
+
+        region = os.environ.get("AWS_REGION", "us-east-1")
+        self.sfn = boto3.client("stepfunctions", region_name=region)
+        self.state_machine_arn = os.environ["STEP_FUNCTION_ARN"]
+        self.callback_url = os.environ.get("CALLBACK_URL", "")
+        self.callback_api_key = os.environ.get("CALLBACK_API_KEY", "")
 
     def run(
         self,
@@ -123,8 +132,36 @@ class LambdaExecutor(Executor):
         duration: Optional[float] = None,
         progress_callback: Optional[Callable[[int, Dict[str, Any]], None]] = None,
     ) -> bool:
-        """Execute job via AWS Lambda."""
+        """Start a Step Functions execution for this job."""
-        raise NotImplementedError("LambdaExecutor not yet implemented")
+        import json
+
+        payload = {
+            "job_id": job_id,
+            "source_key": source_path,
+            "output_key": output_path,
+            "preset": preset,
+            "trim_start": trim_start,
+            "trim_end": trim_end,
+            "duration": duration,
+            "callback_url": self.callback_url,
+            "api_key": self.callback_api_key,
+        }
+
+        response = self.sfn.start_execution(
+            stateMachineArn=self.state_machine_arn,
+            name=f"mpr-{job_id}",
+            input=json.dumps(payload),
+        )
+
+        # Store execution ARN on the job
+        execution_arn = response["executionArn"]
+        try:
+            from mpr.media_assets.models import TranscodeJob
+            TranscodeJob.objects.filter(id=job_id).update(execution_arn=execution_arn)
+        except Exception:
+            pass
+
+        return True
 
 
 # Executor registry

task/lambda_handler.py

@@ -0,0 +1,148 @@
+"""
+AWS Lambda handler for media transcoding.
+
+Receives a job payload from Step Functions, downloads source from S3,
+runs FFmpeg, uploads result to S3, and calls back to the API.
+
+Uses the same core/ffmpeg module as the local Celery worker.
+"""
+
+import json
+import logging
+import os
+import tempfile
+from pathlib import Path
+
+import boto3
+import requests
+
+logger = logging.getLogger()
+logger.setLevel(logging.INFO)
+
+# S3 config
+S3_BUCKET_IN = os.environ.get("S3_BUCKET_IN", "mpr-media-in")
+S3_BUCKET_OUT = os.environ.get("S3_BUCKET_OUT", "mpr-media-out")
+AWS_REGION = os.environ.get("AWS_REGION", "us-east-1")
+
+s3 = boto3.client("s3", region_name=AWS_REGION)
+
+
+def handler(event, context):
+    """
+    Lambda entry point.
+
+    Event payload (from Step Functions):
+    {
+        "job_id": "uuid",
+        "source_key": "path/to/source.mp4",
+        "output_key": "output_filename.mp4",
+        "preset": {...} or null,
+        "trim_start": float or null,
+        "trim_end": float or null,
+        "duration": float or null,
+        "callback_url": "https://mpr.mcrn.ar/api",
+        "api_key": "secret"
+    }
+    """
+    job_id = event["job_id"]
+    source_key = event["source_key"]
+    output_key = event["output_key"]
+    preset = event.get("preset")
+    trim_start = event.get("trim_start")
+    trim_end = event.get("trim_end")
+    duration = event.get("duration")
+    callback_url = event.get("callback_url", "")
+    api_key = event.get("api_key", "")
+
+    logger.info(f"Starting job {job_id}: {source_key} -> {output_key}")
+
+    # Download source from S3
+    ext_in = Path(source_key).suffix or ".mp4"
+    tmp_source = tempfile.mktemp(suffix=ext_in, dir="/tmp")
+    logger.info(f"Downloading s3://{S3_BUCKET_IN}/{source_key}")
+    s3.download_file(S3_BUCKET_IN, source_key, tmp_source)
+
+    # Prepare output temp file
+    ext_out = Path(output_key).suffix or ".mp4"
+    tmp_output = tempfile.mktemp(suffix=ext_out, dir="/tmp")
+
+    try:
+        # Import ffmpeg module (bundled in container)
+        from core.ffmpeg.transcode import TranscodeConfig, transcode
+
+        if preset:
+            config = TranscodeConfig(
+                input_path=tmp_source,
+                output_path=tmp_output,
+                video_codec=preset.get("video_codec", "libx264"),
+                video_bitrate=preset.get("video_bitrate"),
+                video_crf=preset.get("video_crf"),
+                video_preset=preset.get("video_preset"),
+                resolution=preset.get("resolution"),
+                framerate=preset.get("framerate"),
+                audio_codec=preset.get("audio_codec", "aac"),
+                audio_bitrate=preset.get("audio_bitrate"),
+                audio_channels=preset.get("audio_channels"),
+                audio_samplerate=preset.get("audio_samplerate"),
+                container=preset.get("container", "mp4"),
+                extra_args=preset.get("extra_args", []),
+                trim_start=trim_start,
+                trim_end=trim_end,
+            )
+        else:
+            config = TranscodeConfig(
+                input_path=tmp_source,
+                output_path=tmp_output,
+                video_codec="copy",
+                audio_codec="copy",
+                trim_start=trim_start,
+                trim_end=trim_end,
+            )
+
+        success = transcode(config, duration=duration)
+
+        if not success:
+            raise RuntimeError("Transcode returned False")
+
+        # Upload result to S3
+        logger.info(f"Uploading s3://{S3_BUCKET_OUT}/{output_key}")
+        s3.upload_file(tmp_output, S3_BUCKET_OUT, output_key)
+
+        result = {"status": "completed", "job_id": job_id, "output_key": output_key}
+
+        # Callback to API
+        _callback(callback_url, job_id, api_key, {"status": "completed"})
+
+        return result
+
+    except Exception as e:
+        logger.exception(f"Job {job_id} failed: {e}")
+
+        _callback(callback_url, job_id, api_key, {
+            "status": "failed",
+            "error": str(e),
+        })
+
+        return {"status": "failed", "job_id": job_id, "error": str(e)}
+
+    finally:
+        for f in [tmp_source, tmp_output]:
+            try:
+                os.unlink(f)
+            except OSError:
+                pass
+
+
+def _callback(callback_url, job_id, api_key, payload):
+    """Call back to API with job result."""
+    if not callback_url:
+        return
+    try:
+        url = f"{callback_url}/jobs/{job_id}/callback"
+        headers = {}
+        if api_key:
+            headers["X-API-Key"] = api_key
+        resp = requests.post(url, json=payload, headers=headers, timeout=10)
+        logger.info(f"Callback response: {resp.status_code}")
+    except Exception as e:
+        logger.warning(f"Callback failed: {e}")

task/tasks.py

@@ -8,21 +8,19 @@ from typing import Any, Dict, Optional
 
 from celery import shared_task
 
+from core.storage import BUCKET_IN, BUCKET_OUT, download_to_temp, upload_file
 from rpc.server import update_job_progress
 from task.executor import get_executor
 
 logger = logging.getLogger(__name__)
 
-# Media paths from environment
-MEDIA_ROOT = os.environ.get("MEDIA_ROOT", "/app/media")
-
 
 @shared_task(bind=True, queue="transcode", max_retries=3, default_retry_delay=60)
 def run_transcode_job(
     self,
     job_id: str,
-    source_path: str,
+    source_key: str,
-    output_path: str,
+    output_key: str,
     preset: Optional[Dict[str, Any]] = None,
     trim_start: Optional[float] = None,
     trim_end: Optional[float] = None,
@@ -31,25 +29,25 @@ def run_transcode_job(
     """
     Celery task to run a transcode/trim job.
 
-    Args:
+    Downloads source from S3, runs FFmpeg, uploads result to S3.
-        job_id: Unique job identifier
-        source_path: Path to source file
-        output_path: Path for output file
-        preset: Transcode preset dict (optional)
-        trim_start: Trim start time in seconds (optional)
-        trim_end: Trim end time in seconds (optional)
-        duration: Source duration for progress calculation
-
-    Returns:
-        Result dict with status and output_path
     """
-    logger.info(f"Starting job {job_id}: {source_path} -> {output_path}")
+    logger.info(f"Starting job {job_id}: {source_key} -> {output_key}")
 
-    # Update status to processing
     update_job_progress(job_id, progress=0, status="processing")
 
+    # Download source from S3 to temp file
+    logger.info(f"Downloading {source_key} from {BUCKET_IN}")
+    tmp_source = download_to_temp(BUCKET_IN, source_key)
+
+    # Create temp output path with same extension
+    import tempfile
+    from pathlib import Path
+
+    ext = Path(output_key).suffix or ".mp4"
+    fd, tmp_output = tempfile.mkstemp(suffix=ext)
+    os.close(fd)
+
     def progress_callback(percent: int, details: Dict[str, Any]) -> None:
-        """Update gRPC progress state."""
         update_job_progress(
             job_id,
             progress=percent,
@@ -61,8 +59,8 @@ def run_transcode_job(
         executor = get_executor()
         success = executor.run(
             job_id=job_id,
-            source_path=source_path,
+            source_path=tmp_source,
-            output_path=output_path,
+            output_path=tmp_output,
             preset=preset,
             trim_start=trim_start,
             trim_end=trim_end,
@@ -71,12 +69,16 @@ def run_transcode_job(
         )
 
         if success:
+            # Upload result to S3
+            logger.info(f"Uploading {output_key} to {BUCKET_OUT}")
+            upload_file(tmp_output, BUCKET_OUT, output_key)
+
             logger.info(f"Job {job_id} completed successfully")
             update_job_progress(job_id, progress=100, status="completed")
             return {
                 "status": "completed",
                 "job_id": job_id,
-                "output_path": output_path,
+                "output_key": output_key,
             }
         else:
             raise RuntimeError("Executor returned False")
@@ -85,7 +87,6 @@ def run_transcode_job(
         logger.exception(f"Job {job_id} failed: {e}")
         update_job_progress(job_id, progress=0, status="failed", error=str(e))
 
-        # Retry on transient errors
         if self.request.retries < self.max_retries:
             raise self.retry(exc=e)
 
@@ -94,3 +95,11 @@ def run_transcode_job(
             "job_id": job_id,
             "error": str(e),
         }
+
+    finally:
+        # Clean up temp files
+        for f in [tmp_source, tmp_output]:
+            try:
+                os.unlink(f)
+            except OSError:
+                pass

ui/timeline/src/types.ts

@@ -66,6 +66,7 @@ export interface TranscodeJob {
   speed: string | null;
   error_message: string | null;
   celery_task_id: string | null;
+  execution_arn: string | null;
   priority: number;
   created_at: string | null;
   started_at: string | null;
@@ -80,6 +81,7 @@ export interface CreateJobRequest {
   trim_start: number | null;
   trim_end: number | null;
   output_filename: string | null;
+  priority: number;
 }
 
 export interface SystemStatus {
@@ -87,6 +89,13 @@ export interface SystemStatus {
   version: string;
 }
 
+export interface ScanResult {
+  found: number;
+  registered: number;
+  skipped: number;
+  files: string[];
+}
+
 export interface WorkerStatus {
   available: boolean;
   active_jobs: number;