python实现实时视频流播放代码实例

Python  /  管理员 发布于 7年前   388

这篇文章主要介绍了python实现实时视频流播放代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

@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',  }}

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