C->S: OPTIONS rtsp://example.com/media.mp4 RTSP/1.0 CSeq: 1 Require: implicit-play Proxy-Require: gzipped-messages S->C: RTSP/1.0 200 OK CSeq: 1 Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE DESCRIBE A DESCRIBE request includes an RTSP URL (rtsp://...), and the type of reply data that can be handled.
(C 代表客户端 S 代表服务端) C->S: OPTIONS rtsp://example.com/media.mp4 RTSP/1.0 CSeq: 1 Require: implicit-play Proxy-Require: gzipped-messages S->C: RTSP/1.0 200 OK CSeq: 1 Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE DESCRIBE 请求 DESCRIBE请求包括RTSP URL（rtsp:// ...）以及可以处理的回复数据类型。