RTSP及RTP报文分析

一.RTSP报文分析

DESCRIBE rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream RTSP/1.0    //URL
CSeq:0   //信令***
Accept:application/sdp   //表示接受SDP描述
User-Agent:NKPlayer-1.00.00.081112    //客户端名称

RTSP/1.0 401 Unauthorized      //摘要认证
CSeq: 0
WWW-Authenticate: Digest realm="c056e3859e59", nonce="df570961862d38456ececf841a94d580", stale="FALSE"
WWW-Authenticate: Basic realm="c056e3859e59"
Date:  Fri, Aug 21 2020 12:37:44 GMT

DESCRIBE rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream RTSP/1.0
CSeq:1
Accept:application/sdp
Authorization: Digest username="admin", realm="c056e3859e59", nonce="df570961862d38456ececf841a94d580", uri="rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream", response="5960ead765125bea0a9e8434493ab7a7"
User-Agent:NKPlayer-1.00.00.081112

RTSP/1.0 200 OK     //摘要认证通过
CSeq: 1
Content-Type: application/sdp    //content内容为SDP描述
Content-Length: 641

v=0      //SDP版本信息
o=- 1598013464692169 1598013464692169 IN IP4 10.21.84.180
s=Media Presentation   //会话名称
e=NONE   //Email地址
b=AS:5100
t=0 0
a=control:*
m=video 0 RTP/AVP 96    //视频描述
c=IN IP4 0.0.0.0
b=AS:5000
a=recvonly
a=x-dimensions:1920,1080
a=control:trackID=1    //表示视频流用的是trackID1
a=rtpmap:96 H264/90000
a=fmtp:96 profile-level-id=420029; packetization-mode=1; sprop-parameter-sets=Z2QAKKw0yAeAIn5ZuAgICgAAB9AAAF3B0MAOygAAvrwXeXGhgB2UAAF9eC7y4UA=,aO44MA==
m=audio 0 RTP/AVP 8    //音频描述
c=IN IP4 0.0.0.0
b=AS:50
a=recvonly
a=control:trackID=2
a=rtpmap:8 PCMA/8000
a=Media_header:MEDIAINFO=494D4B48010200000400000111710110401F000000FA000000000000000000000000000000000000;      //H私有头部
a=appversion:1.0  //SDP版本号
SETUP rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream/trackID=1 RTSP/1.0
CSeq:2
Authorization: Digest username="admin", realm="c056e3859e59", nonce="df570961862d38456ececf841a94d580", uri="rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream", response="9152b4092ddc3d8e6656843ebb600be0"
Transport:RTP/AVP/TCP;unicast;interleaved=0-1;ssrc=0
User-Agent:NKPlayer-1.00.00.081112

RTSP/1.0 200 OK
CSeq: 2
Session:        999030455;timeout=60
Transport: RTP/AVP/TCP;unicast;interleaved=0-1;ssrc=5167d33b;mode="play"
Date:  Fri, Aug 21 2020 12:37:44 GMT

SETUP rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream/trackID=2 RTSP/1.0
CSeq:3
Authorization: Digest username="admin", realm="c056e3859e59", nonce="df570961862d38456ececf841a94d580", uri="rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream", response="9152b4092ddc3d8e6656843ebb600be0"
Session:999030455;timeout=60
Transport:RTP/AVP/TCP;unicast;interleaved=2-3;ssrc=0
User-Agent:NKPlayer-1.00.00.081112

RTSP/1.0 200 OK
CSeq: 3
Session:        999030455;timeout=60
Transport: RTP/AVP/TCP;unicast;interleaved=2-3;ssrc=28ffc0b7;mode="play"
Date:  Fri, Aug 21 2020 12:37:44 GMT

PLAY rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream RTSP/1.0
CSeq:4
Authorization: Digest username="admin", realm="c056e3859e59", nonce="df570961862d38456ececf841a94d580", uri="rtsp://10.21.84.180:554/mpeg4/ch01/main/av_stream", response="6f52e06fd17fb2d4975f4e1fdaa570f9"
Session:999030455;timeout=60
Range:npt=0.000000-0.000000
User-Agent:NKPlayer-1.00.00.081112

RTSP/1.0 200 OK
CSeq: 4
Session:        999030455
RTP-Info: url=trackID=1;seq=35420,url=trackID=2;seq=50777
Date:  Fri, Aug 21 2020 12:37:44 GMT