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buenosairesam
2026-05-06 11:51:43 -03:00
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commit 946234eb9e
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// Mitus — Rust transport workspace (media/) crate dependency graph
digraph crates {
graph [fontname="monospace" bgcolor="#1e1e2e" pad="0.5"]
node [fontname="monospace" fontcolor="#cdd6f4" style=filled shape=box
fillcolor="#313244" color="#585b70" margin="0.2,0.1"]
edge [color="#585b70" fontname="monospace" fontcolor="#a6adc8"]
// External
ffmpeg_next [label="ffmpeg-next 8\n(client: NUT demux)" shape=component fillcolor="#1e3a2f" color="#a6e3a1"]
tokio [label="tokio 1 (full)\n(async runtime)" shape=component fillcolor="#1e2a3e" color="#89b4fa"]
serde [label="serde / serde_json" shape=component fillcolor="#2a2a3e" color="#cba6f7"]
tracing [label="tracing\ntracing-subscriber" shape=component fillcolor="#2a2a3e" color="#cba6f7"]
anyhow [label="anyhow" shape=component fillcolor="#2a2a3e" color="#cba6f7"]
libc_crate [label="libc 0.2" shape=component fillcolor="#2a2a3e" color="#cba6f7"]
nix_crate [label="nix 0.29\n(signal, process)" shape=component fillcolor="#2a2a3e" color="#cba6f7"]
// Workspace crates
common [label="cht-common\n─────────────\nprotocol.rs (WirePacket framing)\n PacketType: Video|Audio|Control\n ControlMessage: Start|Stop|...\nlogging.rs (tracing init)"
fillcolor="#2d2038" color="#cba6f7"]
client [label="cht-client [sender, Wayland]\n─────────────────────────────\nbackends/subprocess.rs ffmpeg CLI + PulseAudio\n NUT demux → EncodedPacket\nbackends/mod.rs Backend enum\ncapture.rs KmsCapture (direct backend)\nencoder.rs VaapiEncoder + MediaType\npipeline.rs capture→encode thread\nmain.rs wait_for_server, transport,\n YYYYMMDD_HHMMSS session IDs"
fillcolor="#1e2d3e" color="#89b4fa"]
server [label="cht-server [receiver, mcrn]\n─────────────────────────────\nmain.rs TCP listener\n routes Video/Audio/Control\nsession.rs ffmpeg subprocess:\n fMP4 + UDP relay\n ADTS audio writer\n Scene relay (Unix socket)\n keyframe buffering"
fillcolor="#1e2d3e" color="#89b4fa"]
// Deps
client -> common
server -> common
common -> serde
common -> tokio
common -> tracing
common -> anyhow
client -> ffmpeg_next
client -> tokio
client -> tracing
client -> anyhow
client -> libc_crate
client -> nix_crate
server -> tokio
server -> tracing
server -> anyhow
// Legend
subgraph cluster_legend {
label="Legend" fontcolor="#a6adc8" color="#585b70" fontname="monospace"
l1 [label="implemented" fillcolor="#1e2d3e" color="#89b4fa" shape=box]
l3 [label="external crate" fillcolor="#1e3a2f" color="#a6e3a1" shape=component]
}
}

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<?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">
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<!-- Title: crates Pages: 1 -->
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viewBox="0.00 0.00 1507.00 498.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<text xml:space="preserve" text-anchor="middle" x="1277.82" y="-366.2" font-family="monospace" font-size="14.00" fill="#a6adc8">Legend</text>
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<!-- ffmpeg_next -->
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<title>ffmpeg_next</title>
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<text xml:space="preserve" text-anchor="middle" x="425.82" y="-147.8" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg&#45;next 8</text>
<text xml:space="preserve" text-anchor="middle" x="425.82" y="-130.55" font-family="monospace" font-size="14.00" fill="#cdd6f4">(client: NUT demux)</text>
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<text xml:space="preserve" text-anchor="middle" x="565.82" y="-28.4" font-family="monospace" font-size="14.00" fill="#cdd6f4">tokio 1 &#160;(full)</text>
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<title>serde</title>
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<text xml:space="preserve" text-anchor="middle" x="748.82" y="-19.78" font-family="monospace" font-size="14.00" fill="#cdd6f4">serde / serde_json</text>
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<!-- tracing -->
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<title>tracing</title>
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<text xml:space="preserve" text-anchor="middle" x="943.82" y="-11.15" font-family="monospace" font-size="14.00" fill="#cdd6f4">tracing&#45;subscriber</text>
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<title>libc_crate</title>
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<!-- nix_crate -->
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<title>nix_crate</title>
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<text xml:space="preserve" text-anchor="middle" x="230.82" y="-130.55" font-family="monospace" font-size="14.00" fill="#cdd6f4">(signal, process)</text>
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<!-- common -->
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<title>common</title>
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<text xml:space="preserve" text-anchor="middle" x="808.82" y="-182.3" font-family="monospace" font-size="14.00" fill="#cdd6f4">cht&#45;common</text>
<text xml:space="preserve" text-anchor="middle" x="808.82" y="-165.05" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="808.82" y="-147.8" font-family="monospace" font-size="14.00" fill="#cdd6f4">protocol.rs &#160;(WirePacket framing)</text>
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<text xml:space="preserve" text-anchor="middle" x="808.82" y="-96.05" font-family="monospace" font-size="14.00" fill="#cdd6f4">logging.rs &#160;&#160;(tracing init)</text>
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<!-- common&#45;&gt;tokio -->
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<title>common&#45;&gt;tokio</title>
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<!-- common&#45;&gt;serde -->
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<title>client</title>
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<text xml:space="preserve" text-anchor="middle" x="425.82" y="-405.2" font-family="monospace" font-size="14.00" fill="#cdd6f4">cht&#45;client &#160;[sender, Wayland]</text>
<text xml:space="preserve" text-anchor="middle" x="425.82" y="-387.95" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────────────────────</text>
<text xml:space="preserve" text-anchor="middle" x="425.82" y="-370.7" font-family="monospace" font-size="14.00" fill="#cdd6f4">backends/subprocess.rs &#160;ffmpeg CLI + PulseAudio</text>
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<text xml:space="preserve" text-anchor="middle" x="425.82" y="-336.2" font-family="monospace" font-size="14.00" fill="#cdd6f4">backends/mod.rs &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Backend enum</text>
<text xml:space="preserve" text-anchor="middle" x="425.82" y="-318.95" font-family="monospace" font-size="14.00" fill="#cdd6f4">capture.rs &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;KmsCapture (direct backend)</text>
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<text xml:space="preserve" text-anchor="middle" x="425.82" y="-249.95" font-family="monospace" font-size="14.00" fill="#cdd6f4"> &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;YYYYMMDD_HHMMSS session IDs</text>
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<text xml:space="preserve" text-anchor="middle" x="939.82" y="-379.32" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────────────────────</text>
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// Mitus — Python transport pipeline (default mode, --python or no flag)
// Sender bash script wraps ffmpeg CLI; receiver runs ffmpeg in-process via Python.
digraph python_pipeline {
graph [fontname="monospace" bgcolor="#1e1e2e" rankdir=TB pad="0.6" splines=polyline]
node [fontname="monospace" fontcolor="#cdd6f4" style=filled shape=box
fillcolor="#313244" color="#585b70" margin="0.25,0.12"]
edge [color="#585b70" fontname="monospace" fontcolor="#a6adc8"]
// Hardware / OS
drm [label="/dev/dri/card0\n(KMS scanout)" shape=cylinder fillcolor="#1e3a2f" color="#a6e3a1"]
pulse [label="PulseAudio\n─────────────\nmonitor: default sink\nmic: webcam (C922)" shape=cylinder fillcolor="#1e3a2f" color="#a6e3a1"]
net [label="TCP :4444\nmpegts" shape=parallelogram fillcolor="#1e2a3e" color="#89b4fa"]
subgraph cluster_sender {
label="Sender — sender/stream_av.sh" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
watchdog [label="watchdog loop\n─────────────\nffmpeg restart on stall\n(total_size or frame stuck > 10s)\nimmediate restart on\nDRM plane format change"
fillcolor="#2d2038" color="#cba6f7"]
ffmpeg_send [label="ffmpeg CLI\n─────────────\nkmsgrab → hwmap=vaapi\nscale_vaapi 1920x1080 nv12\nh264_vaapi (qp=20, gop=30, no B-frames)\namix(monitor, mic) → aac 128k\nmpegts → TCP"
fillcolor="#1e2d3e" color="#89b4fa"]
}
subgraph cluster_recorder {
label="StreamRecorder — cht/stream/recorder.py" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
ffmpeg_recv [label="ffmpeg listener\n─────────────\nlisten=1 on TCP :4444\n→ 2 outputs:\n fragmented MP4 (recording_*.mp4)\n UDP :4445 (mpegts → mpv)\n stdout pipe (showinfo)"
fillcolor="#1e2d3e" color="#89b4fa"]
scene_pipe [label="scene-detect parser\n─────────────\nreads stdout pipe\nshowinfo → scene timestamps\nemits raw_frame(jpeg, ts)"
fillcolor="#2d2038" color="#cba6f7"]
}
subgraph cluster_processor {
label="SessionProcessor — cht/stream/processor.py" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
frame_writer [label="frame writer\n─────────────\nwrites JPEG to frames/\nappends to index.json\nfires on_new_frames(ts, path)"
fillcolor="#2d2038" color="#cba6f7"]
audio_extract [label="audio extractor\n─────────────\npolls fMP4 for new audio\nffmpeg → 16 kHz mono WAV\nchunks for transcription"
fillcolor="#2d2038" color="#cba6f7"]
tracker [label="RecordingTracker\n─────────────\nffprobe duration\nsums segments\nfeeds timeline UI"
fillcolor="#2d2038" color="#cba6f7"]
}
transcriber [label="TranscriberEngine\n─────────────\ncht/transcriber/engine.py\nfaster-whisper (CUDA)\ngrouped segments → transcript.json"
fillcolor="#2d2038" color="#cba6f7"]
gui [label="Mitus GUI (GTK4)\n─────────────\nMonitor (mpv UDP)\nScrub bar · Frames · Transcript\nAgent input/output"
fillcolor="#2d2038" color="#cba6f7"]
// Outputs
fmp4 [label="stream/\nrecording_*.mp4" shape=folder fillcolor="#2a2a3e" color="#585b70"]
udp [label="UDP :4445\n→ mpv" shape=parallelogram fillcolor="#2a2a3e" color="#585b70"]
frames [label="frames/\nindex.json + *.jpg" shape=folder fillcolor="#2a2a3e" color="#585b70"]
audio [label="audio/\nchunk_*.wav" shape=folder fillcolor="#2a2a3e" color="#585b70"]
txt [label="transcript.json" shape=folder fillcolor="#2a2a3e" color="#585b70"]
// Flow — sender
drm -> ffmpeg_send [label="kmsgrab"]
pulse -> ffmpeg_send [label="-f pulse"]
watchdog -> ffmpeg_send [style=dashed label="restart"]
ffmpeg_send -> net
// Flow — recorder
net -> ffmpeg_recv [label="mpegts"]
ffmpeg_recv -> fmp4
ffmpeg_recv -> udp
ffmpeg_recv -> scene_pipe [label="stdout"]
udp -> gui [label="live\nmonitor"]
// Flow — processor
scene_pipe -> frame_writer [label="raw_frame"]
frame_writer -> frames
fmp4 -> audio_extract [label="poll" style=dashed]
audio_extract -> audio
audio -> transcriber [label="WAV"]
transcriber -> txt
fmp4 -> tracker [label="ffprobe" style=dashed]
tracker -> gui [label="duration"]
// Flow — GUI
frames -> gui
txt -> gui
}

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<title>python_pipeline</title>
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<text xml:space="preserve" text-anchor="middle" x="346.75" y="-1512.06" font-family="monospace" font-size="14.00" fill="#a6adc8">Sender — sender/stream_av.sh</text>
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<g id="node1" class="node">
<title>drm</title>
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<text xml:space="preserve" text-anchor="middle" x="75.75" y="-1439.67" font-family="monospace" font-size="14.00" fill="#cdd6f4">/dev/dri/card0</text>
<text xml:space="preserve" text-anchor="middle" x="75.75" y="-1422.42" font-family="monospace" font-size="14.00" fill="#cdd6f4">(KMS scanout)</text>
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<title>ffmpeg_send</title>
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<text xml:space="preserve" text-anchor="middle" x="346.75" y="-1300.14" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg CLI</text>
<text xml:space="preserve" text-anchor="middle" x="346.75" y="-1282.89" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="346.75" y="-1265.64" font-family="monospace" font-size="14.00" fill="#cdd6f4">kmsgrab → hwmap=vaapi</text>
<text xml:space="preserve" text-anchor="middle" x="346.75" y="-1248.39" font-family="monospace" font-size="14.00" fill="#cdd6f4">scale_vaapi 1920x1080 nv12</text>
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<text xml:space="preserve" text-anchor="middle" x="346.75" y="-1196.64" font-family="monospace" font-size="14.00" fill="#cdd6f4">mpegts → TCP</text>
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<title>drm&#45;&gt;ffmpeg_send</title>
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<text xml:space="preserve" text-anchor="middle" x="646.75" y="-1439.67" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
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<title>pulse&#45;&gt;ffmpeg_send</title>
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<text xml:space="preserve" text-anchor="middle" x="547.71" y="-1344.03" font-family="monospace" font-size="14.00" fill="#a6adc8">&#45;f pulse</text>
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<title>net</title>
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<title>ffmpeg_recv</title>
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<text xml:space="preserve" text-anchor="middle" x="346.75" y="-927.8" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
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<title>net&#45;&gt;ffmpeg_recv</title>
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<title>watchdog</title>
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<title>ffmpeg_recv&#45;&gt;scene_pipe</title>
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<title>fmp4</title>
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<text xml:space="preserve" text-anchor="middle" x="600.75" y="-727.88" font-family="monospace" font-size="14.00" fill="#cdd6f4">stream/</text>
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<title>ffmpeg_recv&#45;&gt;fmp4</title>
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<title>gui</title>
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// Mitus — Rust client (sender) pipeline — media/client/
// Sender machine (Wayland, VAAPI GPU)
digraph rust_client {
graph [fontname="monospace" bgcolor="#1e1e2e" rankdir=TB pad="0.6" splines=polyline]
node [fontname="monospace" fontcolor="#cdd6f4" style=filled shape=box
fillcolor="#313244" color="#585b70" margin="0.25,0.12"]
edge [color="#585b70" fontname="monospace" fontcolor="#a6adc8"]
// Hardware
drm [label="/dev/dri/card0\n(KMS scanout)" shape=cylinder fillcolor="#1e3a2f" color="#a6e3a1"]
vaapi [label="/dev/dri/renderD128\n(VAAPI)" shape=cylinder fillcolor="#1e3a2f" color="#a6e3a1"]
pulse [label="PulseAudio\n─────────────\nmonitor: default_sink.monitor\nmic: default-source" shape=cylinder fillcolor="#1e3a2f" color="#a6e3a1"]
net [label="TCP :4447\nmcrndeb" shape=parallelogram fillcolor="#1e2a3e" color="#89b4fa"]
subgraph cluster_main {
label="main thread (tokio async)" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
wait_server [label="wait_for_server\n─────────────\nretry connect / 2s\nCtrl-C to cancel" fillcolor="#2d2038" color="#cba6f7"]
session_start [label="session_start\n─────────────\nid: YYYYMMDD_HHMMSS\nvideo + audio params" fillcolor="#2d2038" color="#cba6f7"]
mux [label="select!\npkt_rx | keepalive | ctrl-c" fillcolor="#2d2038" color="#cba6f7"]
write [label="BufWriter\nwrite_packet()" fillcolor="#1e2d3e" color="#89b4fa"]
shutdown [label="Shutdown\n─────────────\npipeline.stop() (5s timeout)\nSessionStop (2s timeout)\nsingle Ctrl-C" fillcolor="#2d2038" color="#cba6f7"]
}
subgraph cluster_subprocess {
label="Subprocess backend (default)" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
ffmpeg_cli [label="ffmpeg subprocess\n─────────────\nkmsgrab → VAAPI h264\n+ PulseAudio inputs:\n amix(monitor, mic)\noutput: NUT pipe" fillcolor="#1e2d3e" color="#89b4fa"]
demux [label="NUT Demuxer\n─────────────\nffmpeg-next in-process\nfinds video + audio streams\nsends EncodedPacket\n { data, pts, media_type }" fillcolor="#1e2d3e" color="#89b4fa"]
chan [label="mpsc::channel(64)\nEncodedPacket" shape=parallelogram fillcolor="#2d2038" color="#cba6f7"]
}
subgraph cluster_direct {
label="VaapiDirect backend (experimental)" fontcolor="#6c7086" color="#45475a" fontname="monospace" style=dashed
capture [label="KmsCapture\n─────────────\nDRM_PRIME frames" fillcolor="#2d1e1e" color="#f38ba8"]
encoder [label="VaapiEncoder\n─────────────\nhwmap → scale_vaapi\nh264_vaapi QP=20" fillcolor="#2d1e1e" color="#f38ba8"]
}
// Flow — subprocess
drm -> ffmpeg_cli [label="kmsgrab"]
vaapi -> ffmpeg_cli [label="h264_vaapi"]
pulse -> ffmpeg_cli [label="-f pulse\nmonitor + mic"]
ffmpeg_cli -> demux [label="NUT pipe\n(stdout)"]
demux -> chan [label="EncodedPacket\n(Video or Audio)"]
// Flow — direct (dashed, experimental)
drm -> capture [style=dashed]
vaapi -> encoder [style=dashed]
capture -> encoder [style=dashed label="DRM_PRIME"]
encoder -> chan [style=dashed]
// Flow — main
chan -> mux
wait_server -> session_start
session_start -> write
mux -> write [label="WirePacket\nVideo | Audio"]
write -> net
mux -> shutdown [label="Ctrl-C or\nchannel closed"]
// Types note
types [label="WirePacket types\n─────────────\nVideo: H.264 NALUs + keyframe flag\nAudio: AAC frames\nControl: SessionStart/Stop/Keepalive"
shape=note fillcolor="#2a2a3e" color="#585b70"]
}

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<g id="node1" class="node">
<title>drm</title>
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<title>ffmpeg_cli</title>
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<text xml:space="preserve" text-anchor="middle" x="429" y="-916.66" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg subprocess</text>
<text xml:space="preserve" text-anchor="middle" x="429" y="-899.41" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="429" y="-882.16" font-family="monospace" font-size="14.00" fill="#cdd6f4">kmsgrab → VAAPI h264</text>
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<title>drm&#45;&gt;ffmpeg_cli</title>
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<title>capture</title>
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<text xml:space="preserve" text-anchor="middle" x="183" y="-873.53" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="183" y="-856.28" font-family="monospace" font-size="14.00" fill="#cdd6f4">DRM_PRIME frames</text>
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<!-- drm&#45;&gt;capture -->
<g id="edge6" class="edge">
<title>drm&#45;&gt;capture</title>
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<!-- vaapi -->
<g id="node2" class="node">
<title>vaapi</title>
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<text xml:space="preserve" text-anchor="middle" x="373" y="-1095.62" font-family="monospace" font-size="14.00" fill="#cdd6f4">/dev/dri/renderD128</text>
<text xml:space="preserve" text-anchor="middle" x="373" y="-1078.37" font-family="monospace" font-size="14.00" fill="#cdd6f4">(VAAPI)</text>
</g>
<!-- vaapi&#45;&gt;ffmpeg_cli -->
<g id="edge2" class="edge">
<title>vaapi&#45;&gt;ffmpeg_cli</title>
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<title>encoder</title>
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<text xml:space="preserve" text-anchor="middle" x="201" y="-708.13" font-family="monospace" font-size="14.00" fill="#cdd6f4">VaapiEncoder</text>
<text xml:space="preserve" text-anchor="middle" x="201" y="-690.88" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="201" y="-673.63" font-family="monospace" font-size="14.00" fill="#cdd6f4">hwmap → scale_vaapi</text>
<text xml:space="preserve" text-anchor="middle" x="201" y="-656.38" font-family="monospace" font-size="14.00" fill="#cdd6f4">h264_vaapi QP=20</text>
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<!-- vaapi&#45;&gt;encoder -->
<g id="edge7" class="edge">
<title>vaapi&#45;&gt;encoder</title>
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<title>pulse</title>
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<text xml:space="preserve" text-anchor="middle" x="625" y="-1112.87" font-family="monospace" font-size="14.00" fill="#cdd6f4">PulseAudio</text>
<text xml:space="preserve" text-anchor="middle" x="625" y="-1095.62" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="625" y="-1078.37" font-family="monospace" font-size="14.00" fill="#cdd6f4">monitor: default_sink.monitor</text>
<text xml:space="preserve" text-anchor="middle" x="625" y="-1061.12" font-family="monospace" font-size="14.00" fill="#cdd6f4">mic: default&#45;source</text>
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<!-- pulse&#45;&gt;ffmpeg_cli -->
<g id="edge3" class="edge">
<title>pulse&#45;&gt;ffmpeg_cli</title>
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<text xml:space="preserve" text-anchor="middle" x="603.94" y="-1001.05" font-family="monospace" font-size="14.00" fill="#a6adc8">&#45;f pulse</text>
<text xml:space="preserve" text-anchor="middle" x="603.94" y="-983.8" font-family="monospace" font-size="14.00" fill="#a6adc8">monitor + mic</text>
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<!-- net -->
<g id="node4" class="node">
<title>net</title>
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<text xml:space="preserve" text-anchor="middle" x="1081" y="-55.73" font-family="monospace" font-size="14.00" fill="#cdd6f4">TCP :4447</text>
<text xml:space="preserve" text-anchor="middle" x="1081" y="-38.48" font-family="monospace" font-size="14.00" fill="#cdd6f4">mcrndeb</text>
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<title>wait_server</title>
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<text xml:space="preserve" text-anchor="middle" x="1088" y="-493.6" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="1088" y="-476.35" font-family="monospace" font-size="14.00" fill="#cdd6f4">retry connect / 2s</text>
<text xml:space="preserve" text-anchor="middle" x="1088" y="-459.1" font-family="monospace" font-size="14.00" fill="#cdd6f4">Ctrl&#45;C to cancel</text>
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<title>session_start</title>
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<text xml:space="preserve" text-anchor="middle" x="1088" y="-378.93" font-family="monospace" font-size="14.00" fill="#cdd6f4">session_start</text>
<text xml:space="preserve" text-anchor="middle" x="1088" y="-361.68" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="1088" y="-344.43" font-family="monospace" font-size="14.00" fill="#cdd6f4">id: YYYYMMDD_HHMMSS</text>
<text xml:space="preserve" text-anchor="middle" x="1088" y="-327.18" font-family="monospace" font-size="14.00" fill="#cdd6f4">video + audio params</text>
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<title>wait_server&#45;&gt;session_start</title>
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<!-- write -->
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<title>write</title>
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<title>session_start&#45;&gt;write</title>
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<title>mux</title>
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<text xml:space="preserve" text-anchor="middle" x="840" y="-361.68" font-family="monospace" font-size="14.00" fill="#cdd6f4">select!</text>
<text xml:space="preserve" text-anchor="middle" x="840" y="-344.43" font-family="monospace" font-size="14.00" fill="#cdd6f4">pkt_rx | keepalive | ctrl&#45;c</text>
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<!-- mux&#45;&gt;write -->
<g id="edge13" class="edge">
<title>mux&#45;&gt;write</title>
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<text xml:space="preserve" text-anchor="middle" x="1027.38" y="-283.29" font-family="monospace" font-size="14.00" fill="#a6adc8">WirePacket</text>
<text xml:space="preserve" text-anchor="middle" x="1027.38" y="-266.04" font-family="monospace" font-size="14.00" fill="#a6adc8">Video | Audio</text>
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<title>shutdown</title>
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<text xml:space="preserve" text-anchor="middle" x="845" y="-222.15" font-family="monospace" font-size="14.00" fill="#cdd6f4">Shutdown</text>
<text xml:space="preserve" text-anchor="middle" x="845" y="-204.9" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="845" y="-187.65" font-family="monospace" font-size="14.00" fill="#cdd6f4">pipeline.stop() (5s timeout)</text>
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<text xml:space="preserve" text-anchor="middle" x="845" y="-153.15" font-family="monospace" font-size="14.00" fill="#cdd6f4">single Ctrl&#45;C</text>
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<title>mux&#45;&gt;shutdown</title>
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<text xml:space="preserve" text-anchor="middle" x="897.25" y="-283.29" font-family="monospace" font-size="14.00" fill="#a6adc8">Ctrl&#45;C or</text>
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<!-- write&#45;&gt;net -->
<g id="edge14" class="edge">
<title>write&#45;&gt;net</title>
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<title>demux</title>
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<text xml:space="preserve" text-anchor="middle" x="474" y="-725.38" font-family="monospace" font-size="14.00" fill="#cdd6f4">NUT Demuxer</text>
<text xml:space="preserve" text-anchor="middle" x="474" y="-708.13" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="474" y="-690.88" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg&#45;next in&#45;process</text>
<text xml:space="preserve" text-anchor="middle" x="474" y="-673.63" font-family="monospace" font-size="14.00" fill="#cdd6f4">finds video + audio streams</text>
<text xml:space="preserve" text-anchor="middle" x="474" y="-656.38" font-family="monospace" font-size="14.00" fill="#cdd6f4">sends EncodedPacket</text>
<text xml:space="preserve" text-anchor="middle" x="474" y="-639.13" font-family="monospace" font-size="14.00" fill="#cdd6f4"> &#160;{ data, pts, media_type }</text>
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<title>ffmpeg_cli&#45;&gt;demux</title>
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<text xml:space="preserve" text-anchor="middle" x="488.53" y="-786.52" font-family="monospace" font-size="14.00" fill="#a6adc8">NUT pipe</text>
<text xml:space="preserve" text-anchor="middle" x="488.53" y="-769.27" font-family="monospace" font-size="14.00" fill="#a6adc8">(stdout)</text>
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<title>chan</title>
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<text xml:space="preserve" text-anchor="middle" x="504" y="-493.6" font-family="monospace" font-size="14.00" fill="#cdd6f4">mpsc::channel(64)</text>
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<title>demux&#45;&gt;chan</title>
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<text xml:space="preserve" text-anchor="middle" x="556.8" y="-577.99" font-family="monospace" font-size="14.00" fill="#a6adc8">(Video or Audio)</text>
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<title>chan&#45;&gt;mux</title>
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<title>capture&#45;&gt;encoder</title>
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<title>encoder&#45;&gt;chan</title>
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<title>types</title>
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<text xml:space="preserve" text-anchor="middle" x="947" y="-1121.49" font-family="monospace" font-size="14.00" fill="#cdd6f4">WirePacket types</text>
<text xml:space="preserve" text-anchor="middle" x="947" y="-1104.24" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="947" y="-1086.99" font-family="monospace" font-size="14.00" fill="#cdd6f4">Video: &#160;&#160;H.264 NALUs + keyframe flag</text>
<text xml:space="preserve" text-anchor="middle" x="947" y="-1069.74" font-family="monospace" font-size="14.00" fill="#cdd6f4">Audio: &#160;&#160;AAC frames</text>
<text xml:space="preserve" text-anchor="middle" x="947" y="-1052.49" font-family="monospace" font-size="14.00" fill="#cdd6f4">Control: SessionStart/Stop/Keepalive</text>
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// Mitus — Rust server (receiver) pipeline — media/server/
// Receiver machine (mcrn: X11, RTX 3080, NVDEC)
digraph rust_server {
graph [fontname="monospace" bgcolor="#1e1e2e" rankdir=TB pad="0.6" splines=polyline]
node [fontname="monospace" fontcolor="#cdd6f4" style=filled shape=box
fillcolor="#313244" color="#585b70" margin="0.25,0.12"]
edge [color="#585b70" fontname="monospace" fontcolor="#a6adc8"]
net [label="TCP :4447\n(WirePacket)" shape=parallelogram fillcolor="#1e2a3e" color="#89b4fa"]
python [label="Python GUI\n(cht app)" shape=parallelogram fillcolor="#2a2a3e" color="#cba6f7"]
subgraph cluster_rust {
label="cht-server (Rust)" fontcolor="#a6e3a1" color="#a6e3a1" fontname="monospace"
listener [label="Listener\n─────────────\nTCP accept\nreads WirePacket\nroutes by type:\n Video → ffmpeg + scene relay\n Audio → ADTS file\n Control → session lifecycle"
fillcolor="#1e2d3e" color="#89b4fa"]
ffmpeg_rec [label="ffmpeg subprocess\n─────────────\nH.264 pipe:0 → 2 outputs:\n 1. fMP4 (frag_keyframe)\n 2. UDP :4445 (mpegts)"
fillcolor="#1e2d3e" color="#89b4fa"]
scene_relay [label="Scene Relay\n─────────────\nUnix socket (scene.sock)\nbuffers latest keyframe\nbest-effort: drops if slow\n100ms write timeout"
fillcolor="#1e2d3e" color="#89b4fa"]
audio_writer [label="Audio Writer\n─────────────\nADTS header + raw AAC\n→ stream/audio.aac"
fillcolor="#1e2d3e" color="#89b4fa"]
active_session [label="active-session\n─────────────\nfile at data/active-session\nPython polls to discover\nsession dir" shape=note
fillcolor="#2a2a3e" color="#585b70"]
}
subgraph cluster_python {
label="Python (cht app)" fontcolor="#cba6f7" color="#cba6f7" fontname="monospace"
scene_ffmpeg [label="Scene Detector\n─────────────\nconnects to scene.sock\npipes H.264 → ffmpeg:\n CUDA decode\n select=gt(scene,thresh)\n showinfo → timestamps\n MJPEG → JPEG frames"
fillcolor="#2d2038" color="#cba6f7"]
audio_extract [label="Audio Extractor\n─────────────\nreads audio.aac\nffmpeg → 16kHz mono WAV\nchunks + transcript WAVs"
fillcolor="#2d2038" color="#cba6f7"]
transcriber [label="Transcriber\n─────────────\nfaster-whisper (CUDA)\nsegment grouping\nslider: chunk size + lines/group"
fillcolor="#2d2038" color="#cba6f7"]
}
// Flow — Rust server
net -> listener [label="WirePacket"]
listener -> ffmpeg_rec [label="H.264 video"]
listener -> scene_relay [label="H.264 copy\n+ keyframe flag"]
listener -> audio_writer [label="AAC audio"]
listener -> active_session [style=dashed label="on SessionStart"]
// Flow — Python scene detection
scene_relay -> scene_ffmpeg [label="raw H.264\n(Unix socket)" color="#a6e3a1"]
// Outputs
fmp4 [label="stream/\nrecording_000.mp4\n(fragmented MP4)" shape=folder fillcolor="#2a2a3e" color="#585b70"]
udp_live [label="UDP :4445\n(mpegts → mpv)" shape=parallelogram fillcolor="#2a2a3e" color="#585b70"]
aac_file [label="stream/\naudio.aac\n(ADTS-wrapped)" shape=folder fillcolor="#2a2a3e" color="#585b70"]
frames [label="frames/\nindex.json + *.jpg" shape=folder fillcolor="#2a2a3e" color="#585b70"]
audio_dir [label="audio/\nchunk_*.wav\ntranscript_*.wav" shape=folder fillcolor="#2a2a3e" color="#585b70"]
ffmpeg_rec -> fmp4 [label="copy"]
ffmpeg_rec -> udp_live [label="copy"]
audio_writer -> aac_file
scene_ffmpeg -> frames [label="JPEG on\nscene change"]
audio_extract -> audio_dir
audio_dir -> transcriber [label="WAV chunks"]
// Python reads files
aac_file -> audio_extract [label="reads" style=dashed]
active_session -> python [label="discovers\nsession dir" style=dashed]
}

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<text xml:space="preserve" text-anchor="middle" x="304.12" y="-618.34" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg subprocess</text>
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<text xml:space="preserve" text-anchor="middle" x="816.12" y="-383.92" font-family="monospace" font-size="14.00" fill="#cdd6f4">(ADTS&#45;wrapped)</text>
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<text xml:space="preserve" text-anchor="middle" x="878.12" y="-195.25" font-family="monospace" font-size="14.00" fill="#cdd6f4">reads audio.aac</text>
<text xml:space="preserve" text-anchor="middle" x="878.12" y="-178" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg → 16kHz mono WAV</text>
<text xml:space="preserve" text-anchor="middle" x="878.12" y="-160.75" font-family="monospace" font-size="14.00" fill="#cdd6f4">chunks + transcript WAVs</text>
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<text xml:space="preserve" text-anchor="middle" x="1163.12" y="-195.25" font-family="monospace" font-size="14.00" fill="#cdd6f4">faster&#45;whisper (CUDA)</text>
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// Mitus — top-level architecture
// Sender (Wayland, VAAPI) → network → Receiver (X11, NVDEC/NVENC) → Mitus GUI app
// Two transport modes share the same recording layout and same GUI.
digraph system {
graph [fontname="monospace" bgcolor="#1e1e2e" rankdir=LR pad="0.6" splines=polyline nodesep=0.5 ranksep=0.8]
node [fontname="monospace" fontcolor="#cdd6f4" style=filled shape=box
fillcolor="#313244" color="#585b70" margin="0.25,0.14"]
edge [color="#585b70" fontname="monospace" fontcolor="#a6adc8"]
subgraph cluster_sender {
label="Sender machine — Wayland, VAAPI GPU" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
capture_py [label="kmsgrab + PulseAudio\n─────────────\nsender/stream_av.sh\nffmpeg CLI · h264_vaapi · AAC\nmpegts over TCP" fillcolor="#2d2038" color="#cba6f7"]
capture_rs [label="cht-client (Rust)\n─────────────\nmedia/client/\nffmpeg subprocess (subprocess backend)\nNUT demux → mpsc → WirePacket TCP" fillcolor="#1e2d3e" color="#89b4fa"]
}
subgraph cluster_net {
label="Network" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
net_py [label="TCP :4444\nmpegts" shape=parallelogram fillcolor="#1e2a3e" color="#89b4fa"]
net_rs [label="TCP :4447\nWirePacket framing" shape=parallelogram fillcolor="#1e2a3e" color="#89b4fa"]
}
subgraph cluster_receiver {
label="Receiver (mcrn) — X11, NVENC/NVDEC GPU" fontcolor="#a6adc8" color="#45475a" fontname="monospace"
recorder_py [label="StreamRecorder (Python)\n─────────────\ncht/stream/recorder.py\nffmpeg listener · TCP receive\nfMP4 writer · UDP relay\nstdout-pipe scene detect"
fillcolor="#2d2038" color="#cba6f7"]
recorder_rs [label="cht-server (Rust)\n─────────────\nmedia/server/\nWirePacket router\nfMP4 + UDP relay (ffmpeg)\nADTS audio writer\nUnix-socket scene relay"
fillcolor="#1e2d3e" color="#89b4fa"]
processor [label="SessionProcessor (Python)\n─────────────\ncht/stream/processor.py\nfMP4 → audio.wav (ffmpeg)\nchunked WAVs for transcribe\n[Rust mode: scene detect via\nUnix socket → ffmpeg pipe]"
fillcolor="#2d2038" color="#cba6f7"]
transcriber [label="Transcriber\n─────────────\ncht/transcriber/engine.py\nfaster-whisper · CUDA\nsegment grouping"
fillcolor="#2d2038" color="#cba6f7"]
gui [label="Mitus GUI (GTK4 + libadwaita)\n─────────────\ncht/window.py · cht/ui/*\nMonitor (mpv UDP) · Scrub bar\nFrames panel · Transcript panel\nAgent input/output"
fillcolor="#2d2038" color="#cba6f7"]
agent [label="Agent runner\n─────────────\ncht/agent/*\nClaude SDK · OpenAI/Groq\n@F frame refs · @T transcript refs"
fillcolor="#2d2038" color="#cba6f7"]
store [label="data/<session_id>/\n─────────────\nstream/recording_*.mp4\nstream/audio.aac (Rust mode)\nframes/*.jpg + index.json\naudio/chunk_*.wav\ntranscript.json · thread.json"
shape=folder fillcolor="#2a2a3e" color="#585b70"]
}
// Python transport flow
capture_py -> net_py [color="#cba6f7"]
net_py -> recorder_py [color="#cba6f7"]
recorder_py -> store [color="#cba6f7"]
recorder_py -> processor [label="raw scene\nframes" color="#cba6f7"]
// Rust transport flow
capture_rs -> net_rs [color="#89b4fa"]
net_rs -> recorder_rs [color="#89b4fa"]
recorder_rs -> store [color="#89b4fa"]
recorder_rs -> processor [label="scene.sock\n(H.264)" style=dashed color="#a6e3a1"]
// Shared downstream
store -> processor [style=dashed]
processor -> transcriber [label="WAV chunks"]
transcriber -> store [label="transcript.json"]
store -> gui [label="files + watchers"]
gui -> agent [label="@-mentions"]
agent -> store [label="thread.json" style=dashed]
// Legend
subgraph cluster_legend {
label="Legend" fontcolor="#a6adc8" color="#585b70" fontname="monospace"
l_py [label="Python" fillcolor="#2d2038" color="#cba6f7"]
l_rs [label="Rust" fillcolor="#1e2d3e" color="#89b4fa"]
l_io [label="I/O · network" shape=parallelogram fillcolor="#1e2a3e" color="#89b4fa"]
l_fs [label="filesystem" shape=folder fillcolor="#2a2a3e" color="#585b70"]
}
}

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<title>system</title>
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<title>cluster_sender</title>
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<text xml:space="preserve" text-anchor="middle" x="190.75" y="-311.7" font-family="monospace" font-size="14.00" fill="#a6adc8">Sender machine — Wayland, VAAPI GPU</text>
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<g id="clust2" class="cluster">
<title>cluster_net</title>
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<text xml:space="preserve" text-anchor="middle" x="615.78" y="-315.7" font-family="monospace" font-size="14.00" fill="#a6adc8">Network</text>
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<g id="clust3" class="cluster">
<title>cluster_receiver</title>
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<text xml:space="preserve" text-anchor="middle" x="2096.69" y="-331.7" font-family="monospace" font-size="14.00" fill="#a6adc8">Receiver (mcrn) — X11, NVENC/NVDEC GPU</text>
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<g id="clust4" class="cluster">
<title>cluster_legend</title>
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<text xml:space="preserve" text-anchor="middle" x="190.75" y="-655.7" font-family="monospace" font-size="14.00" fill="#a6adc8">Legend</text>
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<text xml:space="preserve" text-anchor="middle" x="190.75" y="-272.82" font-family="monospace" font-size="14.00" fill="#cdd6f4">kmsgrab + PulseAudio</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-255.57" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-238.32" font-family="monospace" font-size="14.00" fill="#cdd6f4">sender/stream_av.sh</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-221.07" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg CLI · h264_vaapi · AAC</text>
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<text xml:space="preserve" text-anchor="middle" x="615.78" y="-231.7" font-family="monospace" font-size="14.00" fill="#cdd6f4">mpegts</text>
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<g id="edge1" class="edge">
<title>capture_py&#45;&gt;net_py</title>
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<text xml:space="preserve" text-anchor="middle" x="190.75" y="-130.82" font-family="monospace" font-size="14.00" fill="#cdd6f4">cht&#45;client (Rust)</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-113.58" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-96.33" font-family="monospace" font-size="14.00" fill="#cdd6f4">media/client/</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-79.08" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg subprocess (subprocess backend)</text>
<text xml:space="preserve" text-anchor="middle" x="190.75" y="-61.83" font-family="monospace" font-size="14.00" fill="#cdd6f4">NUT demux → mpsc → WirePacket TCP</text>
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<text xml:space="preserve" text-anchor="middle" x="1003.69" y="-275.2" font-family="monospace" font-size="14.00" fill="#cdd6f4">─────────────</text>
<text xml:space="preserve" text-anchor="middle" x="1003.69" y="-257.95" font-family="monospace" font-size="14.00" fill="#cdd6f4">cht/stream/recorder.py</text>
<text xml:space="preserve" text-anchor="middle" x="1003.69" y="-240.7" font-family="monospace" font-size="14.00" fill="#cdd6f4">ffmpeg listener · TCP receive</text>
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<title>net_py&#45;&gt;recorder_py</title>
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<text xml:space="preserve" text-anchor="middle" x="1415.31" y="-161.57" font-family="monospace" font-size="14.00" fill="#cdd6f4">cht/stream/processor.py</text>
<text xml:space="preserve" text-anchor="middle" x="1415.31" y="-144.32" font-family="monospace" font-size="14.00" fill="#cdd6f4">fMP4 → audio.wav (ffmpeg)</text>
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