這篇文章主要介紹了python實現實時視頻流播放代碼實例,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下

@action(methods=['GET'], detail=True)

def video(self, request, pk=None):

"""

獲取設備實時視頻流

:param request:

:param pk:

:return:

"""

device_obj = self.get_object()

# if device_obj.status == 0:

# return Response({'error': '設備離線'})

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: # 任務初始化,設置初始時間

cache.set(cache_id, time.time(), timeout=60)

elif isinstance(cache_status, float) and time.time() - cache_status > 30: # 任務已超時, 返回錯誤信息, 一段時間內不再入隊

return Response({'error': '連接數目超過限制, 請稍后再試'})

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': # 視頻流正常推送中, 刷新播放時間, 返回視頻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': # 視頻任務等待中

return Response({'status': '等待建立視頻連接'})

else: # 建立視頻任務失敗

return Response({'error': '打開視頻失敗'})

class JobQueue:

"""實時視頻播放"""

def __init__(self):

self.video_queue = django_rq.get_queue('video') # 視頻推流消息隊列

def enqueue_video(self, rtsp_address, device_hash):

"""視頻流隊列"""

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))

# 實時視頻流播放

RQ_QUEUES = {

'video': {

'USE_REDIS_CACHE': 'video',

}

}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持我們。

本文標題: python實現實時視頻流播放代碼實例

本文地址: http://www.cppcns.com/jiaoben/python/298114.html

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