**1. RTSP的常用命令与解释
** 其中C是客户端，S是服务端。
1.1 OPTIONS
C->S: OPTION request //询问S有哪些方法可用
S->C: OPTION response //S回应信息中包括提供的所有可用方法
使用举例：
客户端到服务端：
OPTIONS rtsp://218.207.101.236:554/mobile/3/67A451E937422331 RTSP/1.0
Cseq: 1
服务端对OPTIONS的回应：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 1
Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, OPTIONS, ANNOUNCE, RECORD
1.2 DESCRIBE
C->S: DESCRIBE request //要求得到S提供的媒体初始化描述信息
S->C: DESCRIBE response //S回应媒体初始化描述信息，主要是sdp
使用举例：
客户端到服务端：
DESCRIBE rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp RTSP/1.0
Cseq: 2
服务端对OPTIONS的回应：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 2
Content-length: 421
Date: Mon, 03 Aug 2009 08:21:33 GMT
Expires: Mon, 03 Aug 2009 08:21:33 GMT
Content-Type: application/sdp
x-Accept-Retransmit: our-retransmit
x-Accept-Dynamic-Rate: 1
Content-Base: rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/
v=0
o=MediaBox 127992 137813 IN IP4 0.0.0.0
s=RTSP Session
i=Starv Box Live Cast
c=IN IP4 218.207.101.236
t=0 0
a=range:npt=now-
a=control:*
m=video 0 RTP/AVP 96
b=AS:20
a=rtpmap:96 MP4V-ES/1000
a=fmtp:96 profile-level-id=8; config=000001b008000001b5090000010000000120008440fa282c2090a31f; decode_buf=12586
a=range:npt=now-
a=framerate:5
a=framesize:96 176-144
a=cliprect:0,0,144,176
a=control:trackID=1
1.3 SETUP
C->S: SETUP request //设置会话的属性，以及传输模式，提醒S建立会话
S->C: SETUP response //S建立会话，返回会话标识符，以及会话相关信息
客户端到服务端的请求举例：
SETUP rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/trackID=1
RTSP/1.0
Cseq: 3
Transport: RTP/AVP;UNICAST;client_port=16264-16265;mode=play
服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 3
Session: 26633092229589
Date: Mon, 03 Aug 2009 08:21:33 GMT
Expires: Mon, 03 Aug 2009 08:21:33 GMT
Transport: RTP/AVP;UNICAST;mode=play;client_port=16264-16265;server_port=20026-20027
1.4 PLAY
C->S: PLAY request //C请求播放
S->C: PLAY response //S回应该请求的信息
客户端到服务端的请求举例:
PLAY rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp RTSP/1.0
Session: 26633092229589
Cseq: 4
服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 4
Session: 26633092229589
RTP-Info: url=rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/trackID=1;seq=0;rtptime=0
**1.5 PAUSE
** C->S: PAUSE request //C请求暂停播放
S->C: PAUSE response //S回应该请求的信息
客户端到服务端的请求举例:
PAUSE rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/ RTSP/1.0
Cseq: 5
Session: 26633092229589
服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 5
Session: 26633092229589
1.6 TEARDOWN
C->S: TEARDOWN request //C请求关闭会话
S->C: TEARDOWN response //S回应该请求
客户端到服务端的请求举例:
TEARDOWN rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/ RTSP/1.0
Cseq: 6
User-Agent: RealMedia Player HelixDNAClient/10.0.0.11279 (win32)
Session: 26633092229589
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 6
Session: 26633092229589
Connection: Close
2. 一个RTSP客户端和服务器报文交互的例子
**OPTIONS rtsp://192.168.40.81 RTSP/1.0
CSeq: 2
User-Agent: LibVLC/2.0.5 (LIVE555 Streaming Media v2012.09.13)
RTSP/1.0 200 OK
CSeq: 2
Public: SETUP,TEARDOWN,OPTIONS,PLAY,ANNOUNCE,DESCRIBE,SET_PARAMETER,
DESCRIBE rtsp://192.168.40.81 RTSP/1.0
CSeq: 3
User-Agent: LibVLC/2.0.5 (LIVE555 Streaming Media v2012.09.13)
Accept: application/sdp
RTSP/1.0 200 OK
CSeq: 3
Content-Base: rtsp://192.168.40.81
Content-Length: 312
Content-Type: application/sdp
v=0
o=- 1001 1 IN IP4 192.168.40.81
s=H3C IPC Realtime stream
c=IN IP4 192.168.40.81
m=video 0 RTP/AVP 105
a=control:rtsp://192.168.40.81/media/video1/video
a=rtpmap:105 H264/90000
a=fmtp:105 DecoderTag=h3c-v3 RTCP=0
m=audio 0 RTP/AVP 0
a=fmtp:RTCP=0
a=control:rtsp://192.168.40.81/media/video1/audio
SETUP rtsp://192.168.40.81/media/video1/video RTSP/1.0
CSeq: 4
User-Agent: LibVLC/2.0.5 (LIVE555 Streaming Media v2012.09.13)
Transport: RTP/AVP;unicast;client_port=54618-54619
RTSP/1.0 200 OK
CSeq: 4
Transport: RTP/AVP/UDP;unicast;destination=192.168.120.32;client_port=54618-54619;server_port=10108-10109;ssrc=FE3C916;mode="PLAY"
Session: 3d097a874af97a8722f97a87bcf97a8
SETUP rtsp://192.168.40.81/media/video1/audio RTSP/1.0
CSeq: 5
User-Agent: LibVLC/2.0.5 (LIVE555 Streaming Media v2012.09.13)
Transport: RTP/AVP;unicast;client_port=54620-54621
Session: 3d097a874af97a8722f97a87bcf97a8
RTSP/1.0 200 OK
CSeq: 5
Transport: RTP/AVP/UDP;unicast;destination=192.168.120.32;client_port=54620-54621;server_port=10110-10111;ssrc=FE3C916;mode="PLAY"
Session: 3d097a874af97a8722f97a87bcf97a8
PLAY rtsp://192.168.40.81 RTSP/1.0
CSeq: 6
User-Agent: LibVLC/2.0.5 (LIVE555 Streaming Media v2012.09.13)
Session: 3d097a874af97a8722f97a87bcf97a8
Range: npt=0.000-
RTSP/1.0 200 OK
CSeq: 6
**
Session: 3d097a874af97a8722f97a87bcf97a8
注意：服务器没有设置密码登录认证，所以报文中没有Authorization:字段。
转自：https://blog.csdn.net/zhoubotong2012/article/details/79373772