1 了解理论知识：

基本上这一句是真谛：In the most simple case, the client makes a HTTP GET request to the streaming server to open the server to client channel. Then the client  makes a POST request to the server to open the client to server channel.

还要研究一下：“Real Time Streaming Protocol (RTSP)”, section 10.12

2 VLC里使能RTSP over HTTP：

3  学会怎么打开流媒体 URL：