[Freeswitch-users] Strange early media SDP behavior

[Sergey Okhapkin]

Any feedback from FS developers?

On Saturday 14 August 2010, Sergey Okhapkin wrote:
> Late negotiation is on, bypass_media=true. Leg B receives the following SDP
>  in SIP 183 message:
> 
>    v=0
>    o=root 4913 4913 IN IP4 64.21.13.41
>    s=session
>    c=IN IP4 64.21.13.41
>    t=0 0
>    m=audio 37650 RTP/AVP 0 8 18 101
>    a=rtpmap:0 PCMU/8000
>    a=rtpmap:8 PCMA/8000
>    a=rtpmap:18 G729/8000
>    a=fmtp:18 annexb=no
>    a=rtpmap:101 telephone-event/8000
>    a=fmtp:101 0-16
>    a=silenceSupp:off - - - -
>    a=ptime:20
>    a=sendrecv
> 
> 3 codecs in SDP offer. Freeswitch send to leg A SIP 183 with the following
>  SDP:
> 
>    v=0
>    o=root 4913 4913 IN IP4 64.21.13.41
>    s=session
>    c=IN IP4 64.21.13.41
>    t=0 0
>    m=audio 37650 RTP/AVP 0 101
>    a=rtpmap:0 PCMU/8000
>    a=rtpmap:101 telephone-event/8000
>    a=fmtp:101 0-16
>    a=silenceSupp:off - - - -
>    a=ptime:20
> 
> 1 codec only. Why 2 other codecs are removed from SDP? Tested on today's
>  git, older versions have the same behavior. Is it expected behavior or a
>  bug?
> 
> 
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