mirror of
https://github.com/blakeblackshear/frigate.git
synced 2024-11-21 19:07:46 +01:00
635 lines
24 KiB
Python
635 lines
24 KiB
Python
import datetime
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import itertools
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import logging
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import multiprocessing as mp
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import os
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import queue
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import random
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import string
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import subprocess as sp
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import threading
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from collections import defaultdict
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from pathlib import Path
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import psutil
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from peewee import JOIN, DoesNotExist
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from frigate.config import RetainModeEnum, FrigateConfig
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from frigate.const import CACHE_DIR, MAX_SEGMENT_DURATION, RECORD_DIR
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from frigate.models import Event, Recordings
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from frigate.util import area
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logger = logging.getLogger(__name__)
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SECONDS_IN_DAY = 60 * 60 * 24
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def remove_empty_directories(directory):
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# list all directories recursively and sort them by path,
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# longest first
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paths = sorted(
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[x[0] for x in os.walk(RECORD_DIR)],
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key=lambda p: len(str(p)),
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reverse=True,
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)
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for path in paths:
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# don't delete the parent
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if path == RECORD_DIR:
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continue
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if len(os.listdir(path)) == 0:
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os.rmdir(path)
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class RecordingMaintainer(threading.Thread):
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def __init__(
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self, config: FrigateConfig, recordings_info_queue: mp.Queue, stop_event
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):
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threading.Thread.__init__(self)
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self.name = "recording_maint"
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self.config = config
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self.recordings_info_queue = recordings_info_queue
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self.stop_event = stop_event
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self.recordings_info = defaultdict(list)
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self.end_time_cache = {}
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def move_files(self):
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cache_files = sorted(
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[
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d
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for d in os.listdir(CACHE_DIR)
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if os.path.isfile(os.path.join(CACHE_DIR, d))
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and d.endswith(".mp4")
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and not d.startswith("clip_")
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]
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)
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files_in_use = []
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for process in psutil.process_iter():
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try:
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if process.name() != "ffmpeg":
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continue
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flist = process.open_files()
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if flist:
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for nt in flist:
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if nt.path.startswith(CACHE_DIR):
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files_in_use.append(nt.path.split("/")[-1])
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except:
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continue
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# group recordings by camera
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grouped_recordings = defaultdict(list)
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for f in cache_files:
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# Skip files currently in use
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if f in files_in_use:
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continue
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cache_path = os.path.join(CACHE_DIR, f)
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basename = os.path.splitext(f)[0]
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camera, date = basename.rsplit("-", maxsplit=1)
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start_time = datetime.datetime.strptime(date, "%Y%m%d%H%M%S")
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grouped_recordings[camera].append(
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{
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"cache_path": cache_path,
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"start_time": start_time,
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}
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)
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# delete all cached files past the most recent 5
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keep_count = 5
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for camera in grouped_recordings.keys():
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segment_count = len(grouped_recordings[camera])
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if segment_count > keep_count:
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logger.warning(
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f"Unable to keep up with recording segments in cache for {camera}. Keeping the {keep_count} most recent segments out of {segment_count} and discarding the rest..."
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)
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to_remove = grouped_recordings[camera][:-keep_count]
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for f in to_remove:
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cache_path = f["cache_path"]
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Path(cache_path).unlink(missing_ok=True)
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self.end_time_cache.pop(cache_path, None)
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grouped_recordings[camera] = grouped_recordings[camera][-keep_count:]
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for camera, recordings in grouped_recordings.items():
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# clear out all the recording info for old frames
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while (
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len(self.recordings_info[camera]) > 0
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and self.recordings_info[camera][0][0]
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< recordings[0]["start_time"].timestamp()
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):
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self.recordings_info[camera].pop(0)
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# get all events with the end time after the start of the oldest cache file
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# or with end_time None
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events: Event = (
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Event.select()
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.where(
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Event.camera == camera,
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(Event.end_time == None)
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| (Event.end_time >= recordings[0]["start_time"].timestamp()),
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Event.has_clip,
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)
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.order_by(Event.start_time)
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)
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for r in recordings:
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cache_path = r["cache_path"]
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start_time = r["start_time"]
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# Just delete files if recordings are turned off
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if (
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not camera in self.config.cameras
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or not self.config.cameras[camera].record.enabled
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):
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Path(cache_path).unlink(missing_ok=True)
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self.end_time_cache.pop(cache_path, None)
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continue
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if cache_path in self.end_time_cache:
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end_time, duration = self.end_time_cache[cache_path]
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else:
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ffprobe_cmd = [
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"ffprobe",
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"-v",
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"error",
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"-show_entries",
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"format=duration",
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"-of",
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"default=noprint_wrappers=1:nokey=1",
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f"{cache_path}",
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]
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p = sp.run(ffprobe_cmd, capture_output=True)
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if p.returncode == 0 and p.stdout.decode():
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duration = float(p.stdout.decode().strip())
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else:
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duration = -1
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# ensure duration is within expected length
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if 0 < duration < MAX_SEGMENT_DURATION:
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end_time = start_time + datetime.timedelta(seconds=duration)
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self.end_time_cache[cache_path] = (end_time, duration)
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else:
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if duration == -1:
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logger.warning(
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f"Failed to probe corrupt segment {cache_path}: {p.returncode} - {p.stderr}"
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)
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logger.warning(
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f"Discarding a corrupt recording segment: {cache_path}"
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)
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Path(cache_path).unlink(missing_ok=True)
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continue
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# if cached file's start_time is earlier than the retain days for the camera
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if start_time <= (
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(
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datetime.datetime.now()
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- datetime.timedelta(
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days=self.config.cameras[camera].record.retain.days
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)
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)
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):
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# if the cached segment overlaps with the events:
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overlaps = False
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for event in events:
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# if the event starts in the future, stop checking events
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# and remove this segment
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if event.start_time > end_time.timestamp():
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overlaps = False
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Path(cache_path).unlink(missing_ok=True)
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self.end_time_cache.pop(cache_path, None)
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break
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# if the event is in progress or ends after the recording starts, keep it
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# and stop looking at events
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if (
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event.end_time is None
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or event.end_time >= start_time.timestamp()
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):
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overlaps = True
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break
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if overlaps:
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record_mode = self.config.cameras[
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camera
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].record.events.retain.mode
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# move from cache to recordings immediately
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self.store_segment(
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camera,
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start_time,
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end_time,
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duration,
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cache_path,
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record_mode,
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)
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# if it doesn't overlap with an event, go ahead and drop the segment
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# if it ends more than the configured pre_capture for the camera
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else:
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pre_capture = self.config.cameras[
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camera
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].record.events.pre_capture
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most_recently_processed_frame_time = self.recordings_info[
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camera
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][-1][0]
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retain_cutoff = most_recently_processed_frame_time - pre_capture
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if end_time.timestamp() < retain_cutoff:
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Path(cache_path).unlink(missing_ok=True)
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self.end_time_cache.pop(cache_path, None)
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# else retain days includes this segment
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else:
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record_mode = self.config.cameras[camera].record.retain.mode
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self.store_segment(
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camera, start_time, end_time, duration, cache_path, record_mode
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)
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def segment_stats(self, camera, start_time, end_time):
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active_count = 0
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motion_count = 0
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for frame in self.recordings_info[camera]:
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# frame is after end time of segment
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if frame[0] > end_time.timestamp():
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break
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# frame is before start time of segment
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if frame[0] < start_time.timestamp():
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continue
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active_count += len(
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[
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o
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for o in frame[1]
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if not o["false_positive"] and o["motionless_count"] == 0
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]
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)
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motion_count += sum([area(box) for box in frame[2]])
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return (motion_count, active_count)
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def store_segment(
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self,
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camera,
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start_time: datetime.datetime,
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end_time: datetime.datetime,
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duration,
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cache_path,
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store_mode: RetainModeEnum,
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):
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motion_count, active_count = self.segment_stats(camera, start_time, end_time)
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# check if the segment shouldn't be stored
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if (store_mode == RetainModeEnum.motion and motion_count == 0) or (
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store_mode == RetainModeEnum.active_objects and active_count == 0
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):
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Path(cache_path).unlink(missing_ok=True)
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self.end_time_cache.pop(cache_path, None)
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return
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directory = os.path.join(
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RECORD_DIR,
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start_time.astimezone(tz=datetime.timezone.utc).strftime("%Y-%m-%d/%H"),
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camera,
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)
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if not os.path.exists(directory):
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os.makedirs(directory)
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file_name = (
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f"{start_time.replace(tzinfo=datetime.timezone.utc).strftime('%M.%S.mp4')}"
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)
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file_path = os.path.join(directory, file_name)
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try:
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if not os.path.exists(file_path):
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start_frame = datetime.datetime.now().timestamp()
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# add faststart to kept segments to improve metadata reading
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ffmpeg_cmd = [
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"ffmpeg",
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"-y",
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"-i",
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cache_path,
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"-c",
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"copy",
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"-movflags",
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"+faststart",
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file_path,
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]
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p = sp.run(
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ffmpeg_cmd,
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encoding="ascii",
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capture_output=True,
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)
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if p.returncode != 0:
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logger.error(f"Unable to convert {cache_path} to {file_path}")
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logger.error(p.stderr)
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return
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else:
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logger.debug(
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f"Copied {file_path} in {datetime.datetime.now().timestamp()-start_frame} seconds."
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)
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try:
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# get the segment size of the cache file
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# file without faststart is same size
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segment_size = round(
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float(os.path.getsize(cache_path)) / 1000000, 1
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)
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except OSError:
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segment_size = 0
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os.remove(cache_path)
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rand_id = "".join(
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random.choices(string.ascii_lowercase + string.digits, k=6)
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)
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Recordings.create(
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id=f"{start_time.timestamp()}-{rand_id}",
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camera=camera,
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path=file_path,
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start_time=start_time.timestamp(),
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end_time=end_time.timestamp(),
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duration=duration,
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motion=motion_count,
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# TODO: update this to store list of active objects at some point
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objects=active_count,
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segment_size=segment_size,
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)
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except Exception as e:
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logger.error(f"Unable to store recording segment {cache_path}")
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Path(cache_path).unlink(missing_ok=True)
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logger.error(e)
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# clear end_time cache
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self.end_time_cache.pop(cache_path, None)
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def run(self):
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# Check for new files every 5 seconds
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wait_time = 5
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while not self.stop_event.wait(wait_time):
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run_start = datetime.datetime.now().timestamp()
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# empty the recordings info queue
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while True:
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try:
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(
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camera,
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frame_time,
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current_tracked_objects,
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motion_boxes,
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regions,
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) = self.recordings_info_queue.get(False)
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if self.config.cameras[camera].record.enabled:
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self.recordings_info[camera].append(
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(
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frame_time,
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current_tracked_objects,
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motion_boxes,
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regions,
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)
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)
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except queue.Empty:
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break
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try:
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self.move_files()
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except Exception as e:
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logger.error(
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"Error occurred when attempting to maintain recording cache"
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)
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logger.error(e)
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duration = datetime.datetime.now().timestamp() - run_start
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wait_time = max(0, 5 - duration)
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logger.info(f"Exiting recording maintenance...")
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class RecordingCleanup(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 = "recording_cleanup"
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self.config = config
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self.stop_event = stop_event
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def clean_tmp_clips(self):
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# delete any clips more than 5 minutes old
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for p in Path("/tmp/cache").rglob("clip_*.mp4"):
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logger.debug(f"Checking tmp clip {p}.")
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if p.stat().st_mtime < (datetime.datetime.now().timestamp() - 60 * 1):
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logger.debug("Deleting tmp clip.")
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# empty contents of file before unlinking https://github.com/blakeblackshear/frigate/issues/4769
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with open(p, "w"):
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pass
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p.unlink(missing_ok=True)
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def expire_recordings(self):
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logger.debug("Start expire recordings (new).")
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logger.debug("Start deleted cameras.")
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# Handle deleted cameras
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expire_days = self.config.record.retain.days
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expire_before = (
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datetime.datetime.now() - datetime.timedelta(days=expire_days)
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).timestamp()
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no_camera_recordings: Recordings = Recordings.select().where(
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Recordings.camera.not_in(list(self.config.cameras.keys())),
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Recordings.end_time < expire_before,
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)
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deleted_recordings = set()
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for recording in no_camera_recordings:
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Path(recording.path).unlink(missing_ok=True)
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deleted_recordings.add(recording.id)
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logger.debug(f"Expiring {len(deleted_recordings)} recordings")
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Recordings.delete().where(Recordings.id << deleted_recordings).execute()
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logger.debug("End deleted cameras.")
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logger.debug("Start all cameras.")
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for camera, config in self.config.cameras.items():
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logger.debug(f"Start camera: {camera}.")
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# Get the timestamp for cutoff of retained days
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expire_days = config.record.retain.days
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expire_date = (
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datetime.datetime.now() - datetime.timedelta(days=expire_days)
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).timestamp()
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# Get recordings to check for expiration
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recordings: Recordings = (
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Recordings.select()
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.where(
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Recordings.camera == camera,
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Recordings.end_time < expire_date,
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)
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.order_by(Recordings.start_time)
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)
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# Get all the events to check against
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events: Event = (
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Event.select()
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.where(
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Event.camera == camera,
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# need to ensure segments for all events starting
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# before the expire date are included
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Event.start_time < expire_date,
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Event.has_clip,
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)
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.order_by(Event.start_time)
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.objects()
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)
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# loop over recordings and see if they overlap with any non-expired events
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# TODO: expire segments based on segment stats according to config
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event_start = 0
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deleted_recordings = set()
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for recording in recordings.objects().iterator():
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keep = False
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# Now look for a reason to keep this recording segment
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for idx in range(event_start, len(events)):
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event = events[idx]
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# if the event starts in the future, stop checking events
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# and let this recording segment expire
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if event.start_time > recording.end_time:
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keep = False
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break
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# if the event is in progress or ends after the recording starts, keep it
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# and stop looking at events
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if event.end_time is None or event.end_time >= recording.start_time:
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keep = True
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break
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# if the event ends before this recording segment starts, skip
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# this event and check the next event for an overlap.
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# since the events and recordings are sorted, we can skip events
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# that end before the previous recording segment started on future segments
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if event.end_time < recording.start_time:
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event_start = idx
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# Delete recordings outside of the retention window or based on the retention mode
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if (
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not keep
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or (
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config.record.events.retain.mode == RetainModeEnum.motion
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and recording.motion == 0
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)
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or (
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config.record.events.retain.mode
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== RetainModeEnum.active_objects
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and recording.objects == 0
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)
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):
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Path(recording.path).unlink(missing_ok=True)
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deleted_recordings.add(recording.id)
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logger.debug(f"Expiring {len(deleted_recordings)} recordings")
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# delete up to 100,000 at a time
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max_deletes = 100000
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deleted_recordings_list = list(deleted_recordings)
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for i in range(0, len(deleted_recordings_list), max_deletes):
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Recordings.delete().where(
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Recordings.id << deleted_recordings_list[i : i + max_deletes]
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).execute()
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logger.debug(f"End camera: {camera}.")
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logger.debug("End all cameras.")
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logger.debug("End expire recordings (new).")
|
|
|
|
def expire_files(self):
|
|
logger.debug("Start expire files (legacy).")
|
|
|
|
default_expire = (
|
|
datetime.datetime.now().timestamp()
|
|
- SECONDS_IN_DAY * self.config.record.retain.days
|
|
)
|
|
delete_before = {}
|
|
|
|
for name, camera in self.config.cameras.items():
|
|
delete_before[name] = (
|
|
datetime.datetime.now().timestamp()
|
|
- SECONDS_IN_DAY * camera.record.retain.days
|
|
)
|
|
|
|
# find all the recordings older than the oldest recording in the db
|
|
try:
|
|
oldest_recording = Recordings.select().order_by(Recordings.start_time).get()
|
|
|
|
p = Path(oldest_recording.path)
|
|
oldest_timestamp = p.stat().st_mtime - 1
|
|
except DoesNotExist:
|
|
oldest_timestamp = datetime.datetime.now().timestamp()
|
|
except FileNotFoundError:
|
|
logger.warning(f"Unable to find file from recordings database: {p}")
|
|
Recordings.delete().where(Recordings.id == oldest_recording.id).execute()
|
|
return
|
|
|
|
logger.debug(f"Oldest recording in the db: {oldest_timestamp}")
|
|
process = sp.run(
|
|
["find", RECORD_DIR, "-type", "f", "!", "-newermt", f"@{oldest_timestamp}"],
|
|
capture_output=True,
|
|
text=True,
|
|
)
|
|
files_to_check = process.stdout.splitlines()
|
|
|
|
for f in files_to_check:
|
|
p = Path(f)
|
|
try:
|
|
if p.stat().st_mtime < delete_before.get(p.parent.name, default_expire):
|
|
p.unlink(missing_ok=True)
|
|
except FileNotFoundError:
|
|
logger.warning(f"Attempted to expire missing file: {f}")
|
|
|
|
logger.debug("End expire files (legacy).")
|
|
|
|
def sync_recordings(self):
|
|
logger.debug("Start sync recordings.")
|
|
|
|
# get all recordings in the db
|
|
recordings: Recordings = Recordings.select()
|
|
|
|
# get all recordings files on disk
|
|
process = sp.run(
|
|
["find", RECORD_DIR, "-type", "f"],
|
|
capture_output=True,
|
|
text=True,
|
|
)
|
|
files_on_disk = process.stdout.splitlines()
|
|
|
|
recordings_to_delete = []
|
|
for recording in recordings.objects().iterator():
|
|
if not recording.path in files_on_disk:
|
|
recordings_to_delete.append(recording.id)
|
|
|
|
logger.debug(
|
|
f"Deleting {len(recordings_to_delete)} recordings with missing files"
|
|
)
|
|
# delete up to 100,000 at a time
|
|
max_deletes = 100000
|
|
for i in range(0, len(recordings_to_delete), max_deletes):
|
|
Recordings.delete().where(
|
|
Recordings.id << recordings_to_delete[i : i + max_deletes]
|
|
).execute()
|
|
|
|
logger.debug("End sync recordings.")
|
|
|
|
def run(self):
|
|
# on startup sync recordings with disk (disabled due to too much CPU usage)
|
|
# 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(f"Exiting recording cleanup...")
|
|
break
|
|
self.clean_tmp_clips()
|
|
|
|
if counter == 0:
|
|
self.expire_recordings()
|
|
self.expire_files()
|
|
remove_empty_directories(RECORD_DIR)
|