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ensure recording staleness threshold scales with segment_time

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This commit is contained in:
Josh Hawkins 2026-04-29 08:42:57 -05:00
parent d315e0874a
commit 914941090b
1 changed files with 29 additions and 5 deletions
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34
frigate/video/ffmpeg.py
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@ -24,7 +24,7 @@ from frigate.config.camera.updater import (
)
from frigate.const import PROCESS_PRIORITY_HIGH
from frigate.log import LogPipe
from frigate.util.builtin import EventsPerSecond
from frigate.util.builtin import EventsPerSecond, get_ffmpeg_arg_list
from frigate.util.ffmpeg import start_or_restart_ffmpeg, stop_ffmpeg
from frigate.util.image import (
FrameManager,
@ -34,6 +34,23 @@ from frigate.util.process import FrigateProcess
logger = logging.getLogger(__name__)
# all built-in record presets use this segment_time
DEFAULT_RECORD_SEGMENT_TIME = 10
def _get_record_segment_time(config: CameraConfig) -> int:
"""Extract -segment_time from the camera's record output args."""
record_args = get_ffmpeg_arg_list(config.ffmpeg.output_args.record)
if record_args and record_args[0].startswith("preset"):
return DEFAULT_RECORD_SEGMENT_TIME
try:
idx = record_args.index("-segment_time")
return int(record_args[idx + 1])
except (ValueError, IndexError):
return DEFAULT_RECORD_SEGMENT_TIME
def capture_frames(
ffmpeg_process: sp.Popen[Any],
@ -164,6 +181,12 @@ class CameraWatchdog(threading.Thread):
self.latest_cache_segment_time: float = 0
self.record_enable_time: datetime | None = None
# `valid` segments are published with the segment's start time, so the
# gap between consecutive publishes can reach 2 * segment_time. Pad the
# staleness threshold so it's never tighter than that worst case.
segment_time = _get_record_segment_time(self.config)
self.record_stale_threshold = max(120, 2 * segment_time + 30)
# Stall tracking (based on last processed frame)
self._stall_timestamps: deque[float] = deque()
self._stall_active: bool = False
@ -413,16 +436,17 @@ class CameraWatchdog(threading.Thread):
# ensure segments are still being created and that they have valid video data
# Skip checks during grace period to allow segments to start being created
stale_window = timedelta(seconds=self.record_stale_threshold)
cache_stale = not in_grace_period and now_utc > (
latest_cache_dt + timedelta(seconds=120)
latest_cache_dt + stale_window
)
valid_stale = not in_grace_period and now_utc > (
latest_valid_dt + timedelta(seconds=120)
latest_valid_dt + stale_window
)
invalid_stale_condition = (
self.latest_invalid_segment_time > 0
and not in_grace_period
and now_utc > (latest_invalid_dt + timedelta(seconds=120))
and now_utc > (latest_invalid_dt + stale_window)
and self.latest_valid_segment_time
<= self.latest_invalid_segment_time
)
@ -439,7 +463,7 @@ class CameraWatchdog(threading.Thread):
)
self.logger.error(
f"{reason} for {self.config.name} in the last 120s. Restarting the ffmpeg record process..."
f"{reason} for {self.config.name} in the last {self.record_stale_threshold}s. Restarting the ffmpeg record process..."
)
p["process"] = start_or_restart_ffmpeg(
p["cmd"],