consisten one behind

cht/stream/manager.py

@@ -10,10 +10,8 @@ Architecture:
 
 import json
 import logging
-import os
 import re
 import time
-from queue import Queue, Empty
 from threading import Thread
 
 from cht.config import (
@@ -244,10 +242,9 @@ class StreamManager:
         - stderr: parses showinfo lines, queues pts_time values
         - stdout: reads JPEG frames from pipe, pairs with queued timestamps,
           writes files to disk, fires callbacks immediately
-
-        showinfo fires before the JPEG encoder, so timestamps are always
-        queued before the corresponding JPEG data arrives on stdout.
         """
+        from queue import Queue, Empty
+        import os
         ts_queue = Queue()
 
         def _read_stderr():
@@ -269,13 +266,10 @@ class StreamManager:
             buf = b""
             raw_fd = proc.stdout.fileno()
             while True:
-                # os.read on the raw fd returns as soon as ANY data is available
-                # (no Python buffered-IO blocking waiting to fill a buffer)
                 chunk = os.read(raw_fd, 65536)
                 if not chunk:
                     break
                 buf += chunk
-                # Split JPEG frames by SOI (0xFFD8) and EOI (0xFFD9) markers
                 while True:
                     soi = buf.find(b"\xff\xd8")
                     if soi < 0:
@@ -283,12 +277,11 @@ class StreamManager:
                         break
                     eoi = buf.find(b"\xff\xd9", soi + 2)
                     if eoi < 0:
-                        buf = buf[soi:]  # keep from SOI, need more data
+                        buf = buf[soi:]
                         break
                     jpeg_data = buf[soi:eoi + 2]
                     buf = buf[eoi + 2:]
 
-                    # Get timestamp (showinfo fires before encode, so it's queued)
                     try:
                         pts_time = ts_queue.get(timeout=2.0)
                     except Empty: