mirror of
https://github.com/blakeblackshear/frigate.git
synced 2025-12-06 13:34:13 +03:00
143 lines
4.0 KiB
Python
143 lines
4.0 KiB
Python
import multiprocessing as mp
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import queue
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import signal
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import subprocess as sp
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import threading
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from multiprocessing import shared_memory
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from wsgiref.simple_server import make_server
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from setproctitle import setproctitle
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from ws4py.server.wsgirefserver import (
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WebSocketWSGIHandler,
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WebSocketWSGIRequestHandler,
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WSGIServer,
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)
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from ws4py.server.wsgiutils import WebSocketWSGIApplication
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from ws4py.websocket import WebSocket
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from frigate.util import SharedMemoryFrameManager
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class FFMpegConverter(object):
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def __init__(self):
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ffmpeg_cmd = "ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i pipe: -f mpegts -s 640x360 -codec:v mpeg1video -b:v 1000k -bf 0 pipe:".split(
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" "
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)
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self.process = sp.Popen(
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ffmpeg_cmd,
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stdout=sp.PIPE,
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# TODO: logging
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stderr=sp.DEVNULL,
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stdin=sp.PIPE,
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start_new_session=True,
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)
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def write(self, b):
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self.process.stdin.write(b)
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def read(self, length):
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return self.process.stdout.read1(length)
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def exit(self):
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self.process.terminate()
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try:
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self.process.communicate(timeout=30)
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except sp.TimeoutExpired:
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self.process.kill()
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self.process.communicate()
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class BroadcastThread(threading.Thread):
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def __init__(self, converter, websocket_server):
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super(BroadcastThread, self).__init__()
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self.converter = converter
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self.websocket_server = websocket_server
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def run(self):
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while True:
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buf = self.converter.read(65536)
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if buf:
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self.websocket_server.manager.broadcast(buf, binary=True)
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elif self.converter.process.poll() is not None:
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break
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def output_frames(config, video_output_queue):
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threading.current_thread().name = f"output"
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setproctitle(f"frigate.output")
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stop_event = mp.Event()
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def receiveSignal(signalNumber, frame):
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stop_event.set()
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signal.signal(signal.SIGTERM, receiveSignal)
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signal.signal(signal.SIGINT, receiveSignal)
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frame_manager = SharedMemoryFrameManager()
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previous_frames = {}
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# start a websocket server on 8082
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WebSocketWSGIHandler.http_version = "1.1"
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websocket_server = make_server(
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"127.0.0.1",
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8082,
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server_class=WSGIServer,
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handler_class=WebSocketWSGIRequestHandler,
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app=WebSocketWSGIApplication(handler_cls=WebSocket),
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)
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websocket_server.initialize_websockets_manager()
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websocket_thread = threading.Thread(target=websocket_server.serve_forever)
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converter = FFMpegConverter()
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broadcast_thread = BroadcastThread(converter, websocket_server)
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websocket_thread.start()
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broadcast_thread.start()
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while not stop_event.is_set():
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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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) = video_output_queue.get(True, 10)
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except queue.Empty:
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continue
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frame_id = f"{camera}{frame_time}"
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frame = frame_manager.get(frame_id, config.cameras[camera].frame_shape_yuv)
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# send frame to ffmpeg process
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converter.write(frame.tobytes())
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if camera in previous_frames:
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frame_manager.delete(previous_frames[camera])
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previous_frames[camera] = frame_id
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while not video_output_queue.empty():
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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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) = video_output_queue.get(True, 10)
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frame_id = f"{camera}{frame_time}"
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frame = frame_manager.get(frame_id, config.cameras[camera].frame_shape_yuv)
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frame_manager.delete(frame_id)
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converter.exit()
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broadcast_thread.join()
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websocket_server.manager.close_all()
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websocket_server.manager.stop()
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websocket_server.manager.join()
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websocket_server.shutdown()
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websocket_thread.join()
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print("exiting output process...")
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