import datetime
import itertools
import logging
import multiprocessing as mp
import os
import queue
import random
import shutil
import string
import subprocess as sp
import threading
from collections import defaultdict
from pathlib import Path
import psutil
from peewee import JOIN, DoesNotExist
from frigate.config import RetainModeEnum, FrigateConfig
from frigate.const import CACHE_DIR, RECORD_DIR
from frigate.models import Event, Recordings
from frigate.util import area
logger = logging.getLogger(__name__)
SECONDS_IN_DAY = 60 * 60 * 24
def remove_empty_directories(directory):
# list all directories recursively and sort them by path,
# longest first
paths = sorted(
[x[0] for x in os.walk(RECORD_DIR)],
key=lambda p: len(str(p)),
reverse=True,
)
for path in paths:
# don't delete the parent
if path == RECORD_DIR:
continue
if len(os.listdir(path)) == 0:
os.rmdir(path)
class RecordingMaintainer(threading.Thread):
def __init__(
self, config: FrigateConfig, recordings_info_queue: mp.Queue, stop_event
):
threading.Thread.__init__(self)
self.name = "recording_maint"
self.config = config
self.recordings_info_queue = recordings_info_queue
self.stop_event = stop_event
self.recordings_info = defaultdict(list)
self.end_time_cache = {}
def move_files(self):
cache_files = sorted(
[
d
for d in os.listdir(CACHE_DIR)
if os.path.isfile(os.path.join(CACHE_DIR, d))
and d.endswith(".mp4")
and not d.startswith("clip_")
]
)
files_in_use = []
for process in psutil.process_iter():
try:
if process.name() != "ffmpeg":
continue
flist = process.open_files()
if flist:
for nt in flist:
if nt.path.startswith(CACHE_DIR):
files_in_use.append(nt.path.split("/")[-1])
except:
continue
# group recordings by camera
grouped_recordings = defaultdict(list)
for f in cache_files:
# Skip files currently in use
if f in files_in_use:
continue
cache_path = os.path.join(CACHE_DIR, f)
basename = os.path.splitext(f)[0]
camera, date = basename.rsplit("-", maxsplit=1)
start_time = datetime.datetime.strptime(date, "%Y%m%d%H%M%S")
grouped_recordings[camera].append(
{
"cache_path": cache_path,
"start_time": start_time,
}
)
# delete all cached files past the most recent 5
keep_count = 5
for camera in grouped_recordings.keys():
if len(grouped_recordings[camera]) > keep_count:
to_remove = grouped_recordings[camera][:-keep_count]
for f in to_remove:
Path(f["cache_path"]).unlink(missing_ok=True)
self.end_time_cache.pop(f["cache_path"], None)
grouped_recordings[camera] = grouped_recordings[camera][-keep_count:]
for camera, recordings in grouped_recordings.items():
# clear out all the recording info for old frames
while (
len(self.recordings_info[camera]) > 0
and self.recordings_info[camera][0][0]
< recordings[0]["start_time"].timestamp()
):
self.recordings_info[camera].pop(0)
# get all events with the end time after the start of the oldest cache file
# or with end_time None
events: Event = (
Event.select()
.where(
Event.camera == camera,
(Event.end_time == None)
| (Event.end_time >= recordings[0]["start_time"].timestamp()),
Event.has_clip,
)
.order_by(Event.start_time)
)
for r in recordings:
cache_path = r["cache_path"]
start_time = r["start_time"]
# Just delete files if recordings are turned off
if (
not camera in self.config.cameras
or not self.config.cameras[camera].record.enabled
):
Path(cache_path).unlink(missing_ok=True)
self.end_time_cache.pop(cache_path, None)
continue
if cache_path in self.end_time_cache:
end_time, duration = self.end_time_cache[cache_path]
else:
ffprobe_cmd = [
"ffprobe",
"-v",
"error",
"-show_entries",
"format=duration",
"-of",
"default=noprint_wrappers=1:nokey=1",
f"{cache_path}",
]
p = sp.run(ffprobe_cmd, capture_output=True)
if p.returncode == 0:
duration = float(p.stdout.decode().strip())
end_time = start_time + datetime.timedelta(seconds=duration)
self.end_time_cache[cache_path] = (end_time, duration)
else:
logger.warning(f"Discarding a corrupt recording segment: {f}")
Path(cache_path).unlink(missing_ok=True)
continue
# if cached file's start_time is earlier than the retain days for the camera
if start_time <= (
(
datetime.datetime.now()
- datetime.timedelta(
days=self.config.cameras[camera].record.retain.days
)
)
):
# if the cached segment overlaps with the events:
overlaps = False
for event in events:
# if the event starts in the future, stop checking events
# and remove this segment
if event.start_time > end_time.timestamp():
overlaps = False
Path(cache_path).unlink(missing_ok=True)
self.end_time_cache.pop(cache_path, None)
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 >= start_time.timestamp()
):
overlaps = True
break
if overlaps:
record_mode = self.config.cameras[
camera
].record.events.retain.mode
# move from cache to recordings immediately
self.store_segment(
camera,
start_time,
end_time,
duration,
cache_path,
record_mode,
)
# else retain days includes this segment
else:
record_mode = self.config.cameras[camera].record.retain.mode
self.store_segment(
camera, start_time, end_time, duration, cache_path, record_mode
)
def segment_stats(self, camera, start_time, end_time):
active_count = 0
motion_count = 0
for frame in self.recordings_info[camera]:
# frame is after end time of segment
if frame[0] > end_time.timestamp():
break
# frame is before start time of segment
if frame[0] < start_time.timestamp():
continue
active_count += len(
[
o
for o in frame[1]
if not o["false_positive"] and o["motionless_count"] == 0
]
)
motion_count += sum([area(box) for box in frame[2]])
return (motion_count, active_count)
def store_segment(
self,
camera,
start_time,
end_time,
duration,
cache_path,
store_mode: RetainModeEnum,
):
motion_count, active_count = self.segment_stats(camera, start_time, end_time)
# check if the segment shouldn't be stored
if (store_mode == RetainModeEnum.motion and motion_count == 0) or (
store_mode == RetainModeEnum.active_objects and active_count == 0
):
Path(cache_path).unlink(missing_ok=True)
self.end_time_cache.pop(cache_path, None)
return
directory = os.path.join(RECORD_DIR, start_time.strftime("%Y-%m/%d/%H"), camera)
if not os.path.exists(directory):
os.makedirs(directory)
file_name = f"{start_time.strftime('%M.%S.mp4')}"
file_path = os.path.join(directory, file_name)
try:
start_frame = datetime.datetime.now().timestamp()
# copy then delete is required when recordings are stored on some network drives
shutil.copyfile(cache_path, file_path)
logger.debug(
f"Copied {file_path} in {datetime.datetime.now().timestamp()-start_frame} seconds."
)
os.remove(cache_path)
rand_id = "".join(
random.choices(string.ascii_lowercase + string.digits, k=6)
)
Recordings.create(
id=f"{start_time.timestamp()}-{rand_id}",
camera=camera,
path=file_path,
start_time=start_time.timestamp(),
end_time=end_time.timestamp(),
duration=duration,
motion=motion_count,
# TODO: update this to store list of active objects at some point
objects=active_count,
)
except Exception as e:
logger.error(f"Unable to store recording segment {cache_path}")
Path(cache_path).unlink(missing_ok=True)
logger.error(e)
# clear end_time cache
self.end_time_cache.pop(cache_path, None)
def run(self):
# Check for new files every 5 seconds
wait_time = 5
while not self.stop_event.wait(wait_time):
run_start = datetime.datetime.now().timestamp()
# empty the recordings info queue
while True:
try:
(
camera,
frame_time,
current_tracked_objects,
motion_boxes,
regions,
) = self.recordings_info_queue.get(False)
if self.config.cameras[camera].record.enabled:
self.recordings_info[camera].append(
(
frame_time,
current_tracked_objects,
motion_boxes,
regions,
)
)
except queue.Empty:
break
try:
self.move_files()
except Exception as e:
logger.error(
"Error occurred when attempting to maintain recording cache"
)
logger.error(e)
duration = datetime.datetime.now().timestamp() - run_start
wait_time = max(0, 5 - duration)
logger.info(f"Exiting recording maintenance...")
class RecordingCleanup(threading.Thread):
def __init__(self, config: FrigateConfig, stop_event):
threading.Thread.__init__(self)
self.name = "recording_cleanup"
self.config = config
self.stop_event = stop_event
def clean_tmp_clips(self):
# delete any clips more than 5 minutes old
for p in Path("/tmp/cache").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.")
p.unlink(missing_ok=True)
def expire_recordings(self):
logger.debug("Start expire recordings (new).")
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().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")
Recordings.delete().where(Recordings.id << deleted_recordings).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}.")
# When deleting recordings without events, we have to keep at LEAST the configured max clip duration
min_end = (
datetime.datetime.now()
- datetime.timedelta(seconds=config.record.events.max_seconds)
).timestamp()
expire_days = config.record.retain.days
expire_before = (
datetime.datetime.now() - datetime.timedelta(days=expire_days)
).timestamp()
expire_date = min(min_end, expire_before)
# Get recordings to check for expiration
recordings: Recordings = (
Recordings.select()
.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()
.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 = 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 (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)