实时流协议（RTSP）是应用层协议，控制实时数据的传送 。RTSP提供了一个可扩展框架，使受控、按需传输实时数据（如音频与视频）成为可能。数据源包括现场数据与存储在剪辑中的数据。本协议旨在于控制多个数据发送会话，提供了一种选择传送途径（如UDP、组播UDP与TCP）的方法，并提供了一种选择基于RTP (RFC1889)的传送机制的方法。-Real Time Streaming Protocol (RTSP) is an application layer protocol, to control the transmission of real-time data. RTSP provides an extensible framework to enable controlled, on-demand real-time traffic data (such as audio and video) as possible. The data sources include field data and the data stored in the clip. This agreement is designed to control multiple data send session provides an alternative means of transmission (such as UDP, multicast UDP and TCP) and provides an alternative delivery mechanism based on RTP (RFC 1889).