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check avg wait before dropping frames

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This commit is contained in:
Blake Blackshear 2020-02-22 07:36:25 -06:00
parent 81c5b96ed7
commit 3e6f6edf7e
1 changed files with 6 additions and 3 deletions
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9
frigate/video.py
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@ -164,13 +164,17 @@ def track_camera(name, config, ffmpeg_global_config, global_objects_config, dete
plasma_client = plasma.connect("/tmp/plasma")
frame_num = 0
avg_wait = 0.0
fps_tracker = EventsPerSecond()
skipped_fps_tracker = EventsPerSecond()
fps_tracker.start()
skipped_fps_tracker.start()
object_detector.fps.start()
while True:
start = datetime.datetime.now().timestamp()
frame_bytes = ffmpeg_process.stdout.read(frame_size)
duration = datetime.datetime.now().timestamp()-start
avg_wait = (avg_wait*99+duration)/100
if not frame_bytes:
break
@ -194,9 +198,8 @@ def track_camera(name, config, ffmpeg_global_config, global_objects_config, dete
# look for motion
motion_boxes = motion_detector.detect(frame)
# skip object detection if we are below the min_fps
# TODO: its about more than just the FPS. also look at avg wait or min wait
if frame_num > 100 and fps.value < expected_fps-1:
# skip object detection if we are below the min_fps and wait time is less than half the average
if frame_num > 100 and fps.value < expected_fps-1 and duration < 0.5*avg_wait:
skipped_fps_tracker.update()
skipped_fps.value = skipped_fps_tracker.eps()
continue