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avoid running ffprobe for each segment multiple times

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This commit is contained in:
Blake Blackshear 2021-11-19 07:19:45 -06:00
parent 8eabe5dd41
commit a748b70da1
1 changed files with 32 additions and 20 deletions
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20
frigate/record.py
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@ -46,6 +46,7 @@ class RecordingMaintainer(threading.Thread):
self.config = config
self.stop_event = stop_event
self.first_pass = True
self.end_time_cache = {}
def move_files(self):
cache_files = [
@ -89,15 +90,17 @@ class RecordingMaintainer(threading.Thread):
)
# delete all cached files past the most recent 5
keep_count = 5
for camera in grouped_recordings.keys():
if len(grouped_recordings[camera]) > 5:
if len(grouped_recordings[camera]) > keep_count:
sorted_recordings = sorted(
grouped_recordings[camera], key=lambda i: i["start_time"]
)
to_remove = sorted_recordings[:-2]
to_remove = sorted_recordings[:-keep_count]
for f in to_remove:
Path(f["cache_path"]).unlink(missing_ok=True)
grouped_recordings[camera] = sorted_recordings[-2:]
self.end_time_cache.pop(f["cache_path"], None)
grouped_recordings[camera] = sorted_recordings[-keep_count:]
for camera, recordings in grouped_recordings.items():
# get all events with the end time after the start of the oldest cache file
@ -122,8 +125,12 @@ class RecordingMaintainer(threading.Thread):
or not self.config.cameras[camera].record.enabled
):
Path(cache_path).unlink(missing_ok=True)
self.end_time_cache.pop(cache_path, None)
continue
if cache_path in self.end_time_cache:
end_time = self.end_time_cache[cache_path]
else:
ffprobe_cmd = [
"ffprobe",
"-v",
@ -137,7 +144,9 @@ class RecordingMaintainer(threading.Thread):
p = sp.run(ffprobe_cmd, capture_output=True)
if p.returncode == 0:
duration = float(p.stdout.decode().strip())
end_time = start_time + datetime.timedelta(seconds=duration)
self.end_time_cache[
cache_path
] = end_time = start_time + datetime.timedelta(seconds=duration)
else:
logger.warning(f"Discarding a corrupt recording segment: {f}")
Path(cache_path).unlink(missing_ok=True)
@ -216,6 +225,9 @@ class RecordingMaintainer(threading.Thread):
Path(cache_path).unlink(missing_ok=True)
logger.error(e)
# clear end_time cache
self.end_time_cache.pop(cache_path, None)
def run(self):
# Check for new files every 5 seconds
wait_time = 5