1、海康摄像头固定RTSP拉流地址：

rtsp://{username}:{password}@{ip}:{port}/Streaming/Channels/101

port默认为554

2、大华摄像头拉流地址：

rtsp://{username}:{password}@{ip}:{port}/cam/realmonitor?channel=1&subtype=0

port默认为554

3、德盟摄像头拉流地址:

rtsp://{username}:{password}@{ip}:{port}/h264/ch1/main/av_stream

port默认为554