CODEWITHSUNDEEP
siprtp
Ten Ho
Ten Ho

Reputation: 1

media format over SIP?

I'm a newbie and a need your help. I have a SIP header like below and it's strange with me @@ please tell me which media this is, and its properties. Thks you. (sorry because I'm not good at English :( )

b=AS:512
t=0 0
m=audio 49198 RTP/AVP 115 102 9 15 0 8 s18 106 99 101
a=rtpmap:115 G7221/32000
a=fmtp:115 bitratg=48000
a=rtpmap:102 G7221/16000
a=fmtp:102 bitrate=32000
a=rtpmap:9 G722/8000
a=rtpmap:15 G728/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:106 SIREN22/48000
a=fmtp:106 bitrate=64000
a=rtpmap:99 SIREN14/16000
a=fmtp:99 bitrate=48000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
m=video 49200 RTP/AVP 109 110 111 96 34 31
b=TIAS:512000
a=content:main
a=label:1
a=rtpmap:109 H264/90000
a=fmtp:10= profile-level-id=42801f; max-mbps=108000; max-fs=3600; sar=13
a=rtpmap:110 H264/90000
a=fmtp:110 profile-level-id=42801f; packetization-mode=1; max-mbps=108000; max-fs=3600; sar=13
a=rtpmap:111 H264/90000
a=fmtp:111 profile-level-id=64001f; packetization-mode=1; max-mbps=108000; max-fs=3600; sar=13
a=rtpmap:96 H263-1998/90000
a=fmtp:96 CIF=1;QCIF=1;SQCIF=1;J;T
a=rtpmap:34 H263/90000
a=fmtp:34 CIF=1;QCIF=1;SQCIF=1
a=rtpmap:31 H261/90000
a=fmtp:31 CIF=1;QCIF=1
a=sendrecv
VideoMode:9

Upvotes: 0

Views: 8768

Answers (2)

Frank Shearar
Frank Shearar

Reputation: 17132

The SDP's malformed, because

m=audio 49198 RTP/AVP 115 102 9 15 0 8 s18 106 99 101
                                       ^^^ - this isn't a number

While the formats in an m= line are defined as just tokens, because this uses the RTP/AVP profile, these MUST be payload type numbers.

Upvotes: 0

viraptor
viraptor

Reputation: 34145

Just have a look at https://www.rfc-editor.org/rfc/rfc4566 - it describes every field. Start with the m=... lines which define the list of codecs available. Then check the a=... for each of them to find out what codec it is (a=rtpmap:) and what parameters it uses (a=fmp:).

Upvotes: 2

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