python实时视频流播放，python实时显示数据,@action(me

python实时视频流播放，python实时显示数据,@action(me

@action(methods=[‘GET‘], detail=True)    def video(self, request, pk=None):        """        获取设备实时视频流        :param request:        :param pk:        :return:        """        device_obj = self.get_object()        # if device_obj.status == 0:        #     return Response({‘error‘: ‘设备离线‘})        if not device_obj.rtsp_address:            return Response({‘error‘: ‘缺少rtsp地址‘})        cache_id = ‘_video_stream_{}‘.format(device_obj.hash)        cache_status = cache.get(cache_id, None)        if cache_status is None:  # 任务初始化,设置初始时间            cache.set(cache_id, time.time(), timeout=60)        elif isinstance(cache_status, float) and time.time() - cache_status > 30:  # 任务已超时, 返回错误信息, 一段时间内不再入队            return Response({‘error‘: ‘连接数目超过限制, 请稍后再试‘})        ret = job_queue.enqueue_video(rtsp_address=device_obj.rtsp_address, device_hash=device_obj.hash)        logger.info(‘fetch device %s video job status: %s‘, pk, ret._status)        if ret._status == b‘started‘ or ‘started‘:  # 视频流正常推送中, 刷新播放时间, 返回视频ID            cache.set(cache_id, ‘continue‘, timeout=30)            return Response({‘video‘: ‘‘.join([settings.FFMPEG_VIDEO, device_obj.hash])})        elif ret._status == b‘queued‘ or ‘queued‘:  # 视频任务等待中            return Response({‘status‘: ‘等待建立视频连接‘})        else:  # 建立视频任务失败            return Response({‘error‘: ‘打开视频失败‘})

class JobQueue:    """实时视频播放"""    def __init__(self):        self.video_queue = django_rq.get_queue(‘video‘)  # 视频推流消息队列    def enqueue_video(self, rtsp_address, device_hash):        """视频流队列"""        job_id = ‘video_{}‘.format(device_hash)        job = self.video_queue.fetch_job(job_id)        if not job:            job = self.video_queue.enqueue_call(                func=‘utils.ffmpeg.ffmpeg_play‘,                args=(rtsp_address, device_hash),                timeout=-1,                ttl=30,  # 最多等待30秒                result_ttl=0,                job_id=job_id            )        return job

# -*- coding: utf-8 -*-import subprocessimport threadingimport timeimport loggingfrom django.core.cache import cachelogger = logging.getLogger(‘server.default‘)def ffmpeg_play(stream, name):    play = True    cache_id = ‘_video_stream_{}‘.format(name)    cache.set(cache_id, ‘continue‘, timeout=30)    process = None    def upstream():        cmd = "ffmpeg -i ‘{}‘ -c:v h264 -f flv -r 25 -an ‘rtmp://127.0.0.1:1935/live/{}‘".format(stream, name)        process = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, stderr=subprocess.DEVNULL)        try:            logger.info(‘device: {} stream thread start: {}‘.format(name, stream))            while play:                time.sleep(1)        except Exception as e:            logger.info(‘device: {} stream thread error {}‘.format(name, e))        finally:            logger.info(‘device: {} stream thread stop‘.format(name))            process.communicate(b‘q‘)    thr = threading.Thread(target=upstream)    thr.start()    try:        while True:            play = cache.get(cache_id, ‘‘)            if play != ‘continue‘:                logger.info(‘stop device {} video stream‘.format(name))                play = False                break            time.sleep(1)    except Exception as e:        logger.info(‘device: {} play stream error {}‘.format(name, e))        process.communicate(b‘q‘)    logger.info(‘wait device {} video thread stop‘.format(name))    thr.join()    logger.info(‘device {} video job stop‘.format(name))

# 实时视频流播放RQ_QUEUES = {    ‘video‘: {        ‘USE_REDIS_CACHE‘: ‘video‘,    }}

python实时视频流播放