RTSP点播——消息流程实例

最近在研究Android 视频传输方面的内容，看到一篇介绍RTSP协议比较不错的文章，对RTSP的建立过程讲得很详细，转载一下：
http://blog.csdn.net/vincent1941/article/details/2109651
原文如下：

RTSP点播消息流程实例（客户端：VLC， RTSP服务器：LIVE555 Media Server)

1)C(Client)-> M(Media Server)

OPTIONS rtsp://192.168.1.109/1.mpg RTSP/1.0

CSeq: 1

user-Agent: VLC media player(LIVE555 Streaming Media v2007.02.20)

1)M -> C

RTSP/1.0 200 OK

CSeq: 1

Date: wed, Feb 20 2008 07:13:24 GMT

Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE

2)C -> M

DESCRIBE rtsp://192.168.1.109/1.mpg RTSP/1.0

CSeq: 2

Accept: application/sdp

User-Agent: VLC media player(LIVE555 Streaming Media v2007.02.20)

2)M -> C

RTSP/1.0 200 OK

CSeq: 2

Date: wed, Feb 20 2008 07:13:25 GMT

Content-Base: rtsp://192.168.1.109/1.mpg/

Content-type: application/sdp

Content-length: 447

v=0

o =- 2284269756 1 IN IP4 192.168.1.109

s=MPEG-1 or 2 program Stream, streamed by the LIVE555 Media Server

i=1.mpg

t=0 0

a=tool:LIVE555 Streaming Media v2008.02.08

a=type:broadcast

a=control:*

a=range:npt=0-66.181

a=x-qt-text-nam:MPEG-1 or Program Stream, streamed by the LIVE555 Media Server

a=x-qt-text-inf:1.mpg

m=video 0 RTP/AVP 32

c=IN IP4 0.0.0.0

a=control:track1

m=audio 0 RTP/AVP 14

c=IN IP4 0.0.0.0

a=control:track2

3)C -> M

SETUP rtsp://192.168.1.109/1.mpg/track1 RTSP/1.0

CSeq: 3

Transport: RTP/AVP; unicast;client_port=1112-1113

User-Agent: VLC media player(LIVE555 Streaming Media v2007.02.20)

3)M -> C

RTSP/1.0 200 OK

CSeq: 3

Date: wed, Feb 20 2008 07:13:25 GMT

Transport: RTP/AVP;unicast;destination=192.168.1.222;source=192.168.1.109;client_port=1112-1113;server_port=6970-6971

Session: 3

4)C -> M

SETUP rtsp://192.168.1.109/1.mpg/track2 RTSP/1.0

CSeq: 4

Transport: RTP/AVP; unicast;client_port=1114-1115

Session: 3

User-Agent: VLC media player(LIVE555 Streaming Media v2007.02.20)

4)M -> C

RTSP/1.0 200 OK

CSeq: 4

Date: wed, Feb 20 2008 07:13:25 GMT

Transport: RTP/AVP;unicast;destination=192.168.1.222;source=192.168.1.109;client_port=1114-1115;server_port=6972-6973

Session: 3

5)C -> M

PLAY rtsp://192.168.1.109/1.mpg/ RTSP/1.0

CSeq: 5

Session: 3

Range: npt=0.000-

User-Agent: VLC media player(LIVE555 Streaming Media v2007.02.20)

5)M -> C

RTSP/1.0 200 OK

CSeq: 5

Range: npt=0.000-

Session: 3

RTP-Info: url=rtsp://192.168.1.109/1.mpg/track1;seq=9200;rtptime=214793785,url=rtsp://192.168.1.109/1.mpg/track2;seq=12770;rtptime=31721

(开始传输流媒体...)