[SR-Users] RTPengine: shouldn't SDP <sess-version> be incremented when SDP is updated in-dialog?

George Diamantopoulos georgediam at gmail.com
Fri May 4 16:25:42 CEST 2018

Has anyone run into or is concerned by this? Thanks!

On 11 April 2018 at 16:28, George Diamantopoulos <georgediam at gmail.com>

> Hello all,
> I have the following issue (I think) with RTP engine. An INVITE comes in,
> and rtpengine will rewrite the SDP accordingly, as configured in
> kamailio.cfg. After some time a reINVITE is sent out in the opposite
> direction, for session refresh purposes. As I use rtcp-mux-offer in
> kamailio.cfg for this direction, RTPengine will inject the rtcp-mux
> parameter, and this reINVITE is forwarded to the UAC that sent the original
> However, the SDP in the reINVITE is exactly the same as the SDP in the 200
> OK to the original INVITE, with the exception of the rtcp-mux parameter.
> Since the SDP offered from the same end has changed, shouldn't session
> version be incremented as well?
> Does this sound like something that should be reported as a bug to
> rtpengine? Or am I missing something here?
> Thanks!
> Best regards,
> George Diamantopoulos
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