URL规定：
rtsp://username:password@<address>:<port>/Streaming/Channels/<id>(?parm1=value1&parm2-=value2…)
注：VLC或者EasyPlayer可以支持解析URL里的用户名密码，实际发给设备的RTSP请求不支持带用户名密码。
详细描述：
举例说明：
DS-9632N-ST的IP通道01主码流：
rtsp://admin:12345@172.6.22.234:554/Streaming/Channels/101?transportmode=unicast
DS-9016HF-ST的IP通道17主码流：
rtsp://admin:12345@172.6.22.106:554/Streaming/Channels/1701?transportmode=unicast
DS-9016HF-ST的模拟通道01子码流：
rtsp://admin:12345@172.6.22.106:554/Streaming/Channels/102?transportmode=unicast (单播)
rtsp://admin:12345@172.6.22.106:554/Streaming/Channels/102?transportmode=multicast (多播)
rtsp://admin:12345@172.6.22.106:554/Streaming/Channels/102 (?后面可省略，默认单播)
DS-9016HF-ST的零通道主码流（零通道无子码流）：
rtsp://admin:12345@172.6.22.106:554/Streaming/Channels/001
DS-2DF7274-A的第三码流：
rtsp://admin:12345@172.6.10.11:554/Streaming/Channels/103
以下为实例：
rtsp://user2:1234abcd@120.224.60.237:554
rtsp://user2:1234abcd@120.224.60.237:554/Streaming/Channels/101
rtsp://user2:1234abcd@120.224.60.237:554/Streaming/Channels/201
