[Freeswitch-users] Sofia late-negotiation on re-INVITE(codec-modification)

[Brian West]

I don't think this is a bug... I think its by design.

/b

On Dec 21, 2011, at 11:26 AM, Visciano Giovanni wrote:

> I've opened a BUG.
> http://jira.freeswitch.org/browse/FS-3739
> 
> I don't know what's you FS configuration.
> What I know is:
> - SIP "media proxy mode" is OK.
> - re-INVITE for codec modification to image T.38 (t38-passthrough) is OK in all SIP "media mode".
> 
> The "late_negotiation" + "inherit_codec" trick to avoid transcoding in a Back2Back
> (that is no media proxy) configuration works only for the very first call setup SDP offer/answer.
> http://wiki.freeswitch.org/wiki/Codec_negotiation
> 
> Once the call is established, further codec modification via re-INVITE are usually closed on
> each leg (except for t38) and this can led to transcoding (and obvious errors if you can't or don't want
> to transcode).
> 
> Hope this helps you find out your problem.
> 
> Giovanni

-- 
Brian West 
FreeSWITCH Solutions, LLC
Phone: +1 (918) 420-9266 
Fax:   +1 (918) 420-9267
brian at freeswitch.org
http://www.freeswitch.org

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