python实现实时视频流播放代码实例

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

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 subprocess
import threading
import time
import logging

from django.core.cache import cache


logger = 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',
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。