mirror of
https://github.com/blakeblackshear/frigate.git
synced 2024-10-15 20:07:23 +02:00
284 lines
10 KiB
Python
284 lines
10 KiB
Python
import datetime
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import logging
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import os
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import queue
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import threading
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import time
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from pathlib import Path
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from frigate.config import FrigateConfig, RecordConfig
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from frigate.const import CLIPS_DIR
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from frigate.models import Event, Recordings
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from peewee import fn
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logger = logging.getLogger(__name__)
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class EventProcessor(threading.Thread):
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def __init__(
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self, config, camera_processes, event_queue, event_processed_queue, stop_event
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):
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threading.Thread.__init__(self)
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self.name = "event_processor"
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self.config = config
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self.camera_processes = camera_processes
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self.cached_clips = {}
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self.event_queue = event_queue
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self.event_processed_queue = event_processed_queue
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self.events_in_process = {}
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self.stop_event = stop_event
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def should_create_clip(self, camera, event_data):
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if event_data["false_positive"]:
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return False
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record_config: RecordConfig = self.config.cameras[camera].record
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# Recording clips is disabled
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if not record_config.enabled or (
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record_config.retain_days == 0 and not record_config.events.enabled
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):
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return False
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# If there are required zones and there is no overlap
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required_zones = record_config.events.required_zones
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if len(required_zones) > 0 and not set(event_data["entered_zones"]) & set(
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required_zones
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):
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logger.debug(
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f"Not creating clip for {event_data['id']} because it did not enter required zones"
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)
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return False
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# If the required objects are not present
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if (
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record_config.events.objects is not None
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and event_data["label"] not in record_config.events.objects
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):
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logger.debug(
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f"Not creating clip for {event_data['id']} because it did not contain required objects"
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)
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return False
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return True
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def verify_clip(self, camera, end_time):
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# check every 5 seconds for the last required recording
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for _ in range(4):
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recordings_count = (
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Recordings.select()
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.where(Recordings.camera == camera, Recordings.end_time > end_time)
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.limit(1)
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.count()
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)
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if recordings_count > 0:
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return True
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logger.debug(f"Missing recording for {camera} clip. Waiting...")
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time.sleep(5)
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logger.warning(
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f"Unable to verify clip for {camera}. There were no recordings for this camera."
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)
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return False
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def run(self):
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while not self.stop_event.is_set():
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try:
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event_type, camera, event_data = self.event_queue.get(timeout=10)
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except queue.Empty:
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# if not self.stop_event.is_set():
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# self.refresh_cache()
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continue
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logger.debug(f"Event received: {event_type} {camera} {event_data['id']}")
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# self.refresh_cache()
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if event_type == "start":
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self.events_in_process[event_data["id"]] = event_data
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if event_type == "end":
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record_config: RecordConfig = self.config.cameras[camera].record
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has_clip = self.should_create_clip(camera, event_data)
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# Wait for recordings to be ready
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if has_clip:
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has_clip = self.verify_clip(
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camera,
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event_data["end_time"] + record_config.events.post_capture,
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)
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if has_clip or event_data["has_snapshot"]:
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Event.create(
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id=event_data["id"],
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label=event_data["label"],
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camera=camera,
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start_time=event_data["start_time"],
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end_time=event_data["end_time"],
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top_score=event_data["top_score"],
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false_positive=event_data["false_positive"],
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zones=list(event_data["entered_zones"]),
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thumbnail=event_data["thumbnail"],
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has_clip=has_clip,
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has_snapshot=event_data["has_snapshot"],
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)
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del self.events_in_process[event_data["id"]]
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self.event_processed_queue.put((event_data["id"], camera, has_clip))
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logger.info(f"Exiting event processor...")
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class EventCleanup(threading.Thread):
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def __init__(self, config: FrigateConfig, stop_event):
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threading.Thread.__init__(self)
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self.name = "event_cleanup"
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self.config = config
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self.stop_event = stop_event
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self.camera_keys = list(self.config.cameras.keys())
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def expire(self, media_type):
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## Expire events from unlisted cameras based on the global config
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if media_type == "clips":
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retain_config = self.config.clips.retain
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file_extension = "mp4"
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update_params = {"has_clip": False}
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else:
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retain_config = self.config.snapshots.retain
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file_extension = "jpg"
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update_params = {"has_snapshot": False}
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distinct_labels = (
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Event.select(Event.label)
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.where(Event.camera.not_in(self.camera_keys))
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.distinct()
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)
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# loop over object types in db
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for l in distinct_labels:
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# get expiration time for this label
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expire_days = retain_config.objects.get(l.label, retain_config.default)
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expire_after = (
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datetime.datetime.now() - datetime.timedelta(days=expire_days)
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).timestamp()
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# grab all events after specific time
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expired_events = Event.select().where(
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Event.camera.not_in(self.camera_keys),
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Event.start_time < expire_after,
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Event.label == l.label,
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)
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# delete the media from disk
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for event in expired_events:
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media_name = f"{event.camera}-{event.id}"
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media_path = Path(
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f"{os.path.join(CLIPS_DIR, media_name)}.{file_extension}"
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)
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media_path.unlink(missing_ok=True)
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if file_extension == "jpg":
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media_path = Path(
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f"{os.path.join(CLIPS_DIR, media_name)}-clean.png"
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)
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media_path.unlink(missing_ok=True)
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# update the clips attribute for the db entry
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update_query = Event.update(update_params).where(
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Event.camera.not_in(self.camera_keys),
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Event.start_time < expire_after,
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Event.label == l.label,
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)
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update_query.execute()
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## Expire events from cameras based on the camera config
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for name, camera in self.config.cameras.items():
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if media_type == "clips":
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retain_config = camera.clips.retain
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else:
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retain_config = camera.snapshots.retain
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# get distinct objects in database for this camera
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distinct_labels = (
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Event.select(Event.label).where(Event.camera == name).distinct()
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)
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# loop over object types in db
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for l in distinct_labels:
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# get expiration time for this label
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expire_days = retain_config.objects.get(l.label, retain_config.default)
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expire_after = (
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datetime.datetime.now() - datetime.timedelta(days=expire_days)
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).timestamp()
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# grab all events after specific time
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expired_events = Event.select().where(
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Event.camera == name,
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Event.start_time < expire_after,
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Event.label == l.label,
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)
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# delete the grabbed clips from disk
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for event in expired_events:
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media_name = f"{event.camera}-{event.id}"
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media_path = Path(
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f"{os.path.join(CLIPS_DIR, media_name)}.{file_extension}"
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)
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media_path.unlink(missing_ok=True)
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if file_extension == "jpg":
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media_path = Path(
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f"{os.path.join(CLIPS_DIR, media_name)}-clean.png"
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)
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media_path.unlink(missing_ok=True)
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# update the clips attribute for the db entry
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update_query = Event.update(update_params).where(
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Event.camera == name,
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Event.start_time < expire_after,
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Event.label == l.label,
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)
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update_query.execute()
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def purge_duplicates(self):
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duplicate_query = """with grouped_events as (
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select id,
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label,
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camera,
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has_snapshot,
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has_clip,
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row_number() over (
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partition by label, camera, round(start_time/5,0)*5
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order by end_time-start_time desc
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) as copy_number
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from event
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)
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select distinct id, camera, has_snapshot, has_clip from grouped_events
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where copy_number > 1;"""
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duplicate_events = Event.raw(duplicate_query)
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for event in duplicate_events:
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logger.debug(f"Removing duplicate: {event.id}")
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media_name = f"{event.camera}-{event.id}"
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if event.has_snapshot:
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media_path = Path(f"{os.path.join(CLIPS_DIR, media_name)}.jpg")
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media_path.unlink(missing_ok=True)
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if event.has_clip:
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media_path = Path(f"{os.path.join(CLIPS_DIR, media_name)}.mp4")
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media_path.unlink(missing_ok=True)
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(
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Event.delete()
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.where(Event.id << [event.id for event in duplicate_events])
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.execute()
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)
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def run(self):
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# only expire events every 5 minutes
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while not self.stop_event.wait(300):
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self.expire("clips")
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self.expire("snapshots")
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self.purge_duplicates()
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# drop events from db where has_clip and has_snapshot are false
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delete_query = Event.delete().where(
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Event.has_clip == False, Event.has_snapshot == False
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)
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delete_query.execute()
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logger.info(f"Exiting event cleanup...")
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