"""Cleanup recordings that are expired based on retention config.""" import datetime import itertools import logging import os import threading from multiprocessing.synchronize import Event as MpEvent from pathlib import Path from peewee import DatabaseError, chunked from frigate.config import FrigateConfig, RetainModeEnum from frigate.const import CACHE_DIR, RECORD_DIR from frigate.models import Event, Recordings, RecordingsToDelete from frigate.record.util import remove_empty_directories logger = logging.getLogger(__name__) class RecordingCleanup(threading.Thread): """Cleanup existing recordings based on retention config.""" def __init__(self, config: FrigateConfig, stop_event: MpEvent) -> None: threading.Thread.__init__(self) self.name = "recording_cleanup" self.config = config self.stop_event = stop_event def clean_tmp_clips(self) -> None: """delete any clips in the cache that are more than 5 minutes old.""" for p in Path(CACHE_DIR).rglob("clip_*.mp4"): logger.debug(f"Checking tmp clip {p}.") if p.stat().st_mtime < (datetime.datetime.now().timestamp() - 60 * 1): logger.debug("Deleting tmp clip.") # empty contents of file before unlinking https://github.com/blakeblackshear/frigate/issues/4769 with open(p, "w"): pass p.unlink(missing_ok=True) def expire_recordings(self) -> None: """Delete recordings based on retention config.""" logger.debug("Start expire recordings.") logger.debug("Start deleted cameras.") # Handle deleted cameras expire_days = self.config.record.retain.days expire_before = ( datetime.datetime.now() - datetime.timedelta(days=expire_days) ).timestamp() no_camera_recordings: Recordings = Recordings.select( Recordings.id, Recordings.path, ).where( Recordings.camera.not_in(list(self.config.cameras.keys())), Recordings.end_time < expire_before, ) deleted_recordings = set() for recording in no_camera_recordings: Path(recording.path).unlink(missing_ok=True) deleted_recordings.add(recording.id) logger.debug(f"Expiring {len(deleted_recordings)} recordings") # delete up to 100,000 at a time max_deletes = 100000 deleted_recordings_list = list(deleted_recordings) for i in range(0, len(deleted_recordings_list), max_deletes): Recordings.delete().where( Recordings.id << deleted_recordings_list[i : i + max_deletes] ).execute() logger.debug("End deleted cameras.") logger.debug("Start all cameras.") for camera, config in self.config.cameras.items(): logger.debug(f"Start camera: {camera}.") # Get the timestamp for cutoff of retained days expire_days = config.record.retain.days expire_date = ( datetime.datetime.now() - datetime.timedelta(days=expire_days) ).timestamp() # Get recordings to check for expiration recordings: Recordings = ( Recordings.select( Recordings.id, Recordings.start_time, Recordings.end_time, Recordings.path, Recordings.objects, Recordings.motion, ) .where( Recordings.camera == camera, Recordings.end_time < expire_date, ) .order_by(Recordings.start_time) ) # Get all the events to check against events: Event = ( Event.select( Event.start_time, Event.end_time, ) .where( Event.camera == camera, # need to ensure segments for all events starting # before the expire date are included Event.start_time < expire_date, Event.has_clip, ) .order_by(Event.start_time) .objects() ) # loop over recordings and see if they overlap with any non-expired events # TODO: expire segments based on segment stats according to config event_start = 0 deleted_recordings = set() for recording in recordings.objects().iterator(): keep = False # Now look for a reason to keep this recording segment for idx in range(event_start, len(events)): event: Event = events[idx] # if the event starts in the future, stop checking events # and let this recording segment expire if event.start_time > recording.end_time: keep = False break # if the event is in progress or ends after the recording starts, keep it # and stop looking at events if event.end_time is None or event.end_time >= recording.start_time: keep = True break # if the event ends before this recording segment starts, skip # this event and check the next event for an overlap. # since the events and recordings are sorted, we can skip events # that end before the previous recording segment started on future segments if event.end_time < recording.start_time: event_start = idx # Delete recordings outside of the retention window or based on the retention mode if ( not keep or ( config.record.events.retain.mode == RetainModeEnum.motion and recording.motion == 0 ) or ( config.record.events.retain.mode == RetainModeEnum.active_objects and recording.objects == 0 ) ): Path(recording.path).unlink(missing_ok=True) deleted_recordings.add(recording.id) logger.debug(f"Expiring {len(deleted_recordings)} recordings") # delete up to 100,000 at a time max_deletes = 100000 deleted_recordings_list = list(deleted_recordings) for i in range(0, len(deleted_recordings_list), max_deletes): Recordings.delete().where( Recordings.id << deleted_recordings_list[i : i + max_deletes] ).execute() logger.debug(f"End camera: {camera}.") logger.debug("End all cameras.") logger.debug("End expire recordings.") def sync_recordings(self) -> None: """Check the db for stale recordings entries that don't exist in the filesystem.""" logger.debug("Start sync recordings.") # get all recordings in the db recordings = Recordings.select(Recordings.id, Recordings.path) # get all recordings files on disk and put them in a set files_on_disk = { os.path.join(root, file) for root, _, files in os.walk(RECORD_DIR) for file in files } # Use pagination to process records in chunks page_size = 1000 num_pages = (recordings.count() + page_size - 1) // page_size recordings_to_delete = set() for page in range(num_pages): for recording in recordings.paginate(page, page_size): if recording.path not in files_on_disk: recordings_to_delete.add(recording.id) # convert back to list of dictionaries for insertion recordings_to_delete = [ {"id": recording_id} for recording_id in recordings_to_delete ] if len(recordings_to_delete) / max(1, recordings.count()) > 0.5: logger.debug( f"Deleting {(len(recordings_to_delete) / recordings.count()):2f}% of recordings could be due to configuration error. Aborting..." ) return logger.debug( f"Deleting {len(recordings_to_delete)} recordings with missing files" ) # create a temporary table for deletion RecordingsToDelete.create_table(temporary=True) # insert ids to the temporary table max_inserts = 1000 for batch in chunked(recordings_to_delete, max_inserts): RecordingsToDelete.insert_many(batch).execute() try: # delete records in the main table that exist in the temporary table query = Recordings.delete().where( Recordings.id.in_(RecordingsToDelete.select(RecordingsToDelete.id)) ) query.execute() except DatabaseError as e: logger.error(f"Database error during delete: {e}") logger.debug("End sync recordings.") def run(self) -> None: # on startup sync recordings with disk if enabled if self.config.record.sync_on_startup: self.sync_recordings() # Expire tmp clips every minute, recordings and clean directories every hour. for counter in itertools.cycle(range(self.config.record.expire_interval)): if self.stop_event.wait(60): logger.info("Exiting recording cleanup...") break self.clean_tmp_clips() if counter == 0: self.expire_recordings() remove_empty_directories(RECORD_DIR)