[Freeswitch-users] SDP with 2 m=audio lines

[Vitalie Colosov]

I think next reply will be whether you already opened Jira case or not yet
:)

2012/2/14 Sergey Okhapkin <sos at sokhapkin.dyndns.org>

> I noticed that recent freeswitch versions could send SDP with 2 m=audio
> lines.
> Per RFC 3388, the behavior is undefined this case. I don't know how to
> reproduce the problem, I see such packets coming from my customers. Here
> is an
> example:
>
> INVITE sip:xxxxxxxxxxxx at sip.callwithus.com SIP/2.0
> ...
> User-Agent: FreeSWITCH-mod_sofia/1.0.head-git-eeeaf41 2012-02-10 17-27-50
> -0600
> ....
>
> v=0
> o=FreeSWITCH 1329167961 1329167962 IN IP4 xx.xx.xx.xx
> s=FreeSWITCH
> c=IN IP4 xx.xx.xx.xx
> t=0 0
> m=audio 24598 RTP/AVP 0 101 13
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:30
> m=audio 24598 RTP/AVP 98 0 8 3 101 13
> a=rtpmap:98 SILK/8000
> a=fmtp:98 useinbandfec=1; usedtx=0
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:20
>
>
> Hmm, I just realized that this SDP is buggy - 2 audio streams on the same
> port, with common codecs, but with different ptime :-)
>
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