Question

从网络摄像头接收到警报后，我执行一个命令，查看每个有活动警报的摄像机的实时视频流15秒。我的代码很简单：

if alarms:
#this is working and the cameras are displayed for 15 seconds
p=subprocess.Popen(["cvlc","rtsp://IP_ALARM:554","--run-time=15","--stop-time=15","vlc://quit"])

我只是想知道如何防止多次显示同一个相机。

如果我有来自同一相机的两个闹钟，则此相机将显示两次。在警报中，我有每个摄像头的索引。谢谢。

Answer 1

为什么不向命令添加参数？

alarms = [{'ip': '192.168.0.1', 'offline': True}]
for alarm in alarms:
    if alarm['offline']:
        #this is working and the cameras are displayed for 15 seconds
        p=subprocess.Popen(["cvlc","rtsp://%s:554","--run-time=15","--stop-time=15","vlc://quit"] % alarm['ip'])

如何知道特定进程在python中运行？

1 个答案: