实时流协议rtsp是一个流媒体表示控制协议，用于控制具有实时特性的数据发送，但RTSP本身并不传输数据。

RTSP is a streaming media presentation control protocol used to manage the delivery of real-time data. It doesn't transfer streaming data by itself.

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采用UDP/RTP/RTCP协议传输多媒体流信息和TCP协议传输数据信息及其控制信息；

The multimedia stream is transported with UDP/RTP/RTCP protocol. The data and controlling information is transported with TCP protocol.

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