Merge fa116949ce into 6f80bcd19f

The record watchdog compares latest_valid_segment_time against now() with
the record_stale_threshold. Publishing the segment start time means the
newest validated timestamp is already ~2x segment duration old in healthy
steady state (own duration + next segment recording + maintainer latency),
leaving little margin before a working ffmpeg record process is restarted.
Publish the end time so staleness measures the actual age of the newest
validated video data.

frigate/record/maintainer.py

@@ -383,8 +383,11 @@ class RecordingMaintainer(threading.Thread):
                 return None
 
             # this segment has a valid duration and has video data, so publish an update
+            # publish the segment end time so the watchdog measures the age of the
+            # newest validated video data; the start time is already ~2x segment
+            # duration old by the time the next segment finishes and is validated
             self.recordings_publisher.publish(
-                (camera, start_time.timestamp(), cache_path),
+                (camera, end_time.timestamp(), cache_path),
                 RecordingsDataTypeEnum.valid.value,
             )