Re: [SR-Users] RTPEngine: rtpengine_manage(), Subsequent requests, Transcoding
On 29/05/2019 06.57, Carsten Bock wrote: Hi, quick question: If understood it correctly in the past (and it worked for me quite well this way), I can simply call rtpengine_manage() for subsequent requests without adding any additional information (e.g. used interfaces, RTP/SRTP translation or anything like that), as this information is stored in the internal hash table of the RTPEngine module during call setup and initial offer/answer. However, this does not seem to apply to the transcoding options. When I just call "rtpengine_manage()" for a Re-INVITE of a transcoded call (in my case AMR-WB to G722), the transcoding options are no longer applied. The forwarded offer does not get the transcoded codecs added (e.g. in my case G722 is not added to the list of AMR/AMR-WB from the phone). Did I misunderstand something or is it a bug? My RTPEngine is still on 7.2, but I will double check with more recent versions today or tomorrow. However, I also found no commit messages relating to this. It depends on your point of view whether you see this as a feature, a bug, or a missing feature. :) But yes, currently the codecs seen in an offer SDP passing through empty out the list of known codecs and populates it fresh, which requires the desired transcoding options to be given fresh also. The reason for this is that it's obviously possible for a client to start a codec renegotiation at any time, and that may result in a different codec pairing after a re-invite. So the preferred way to handle this is to detect it in your script and pass the appropriate options. Cheers ___ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
[SR-Users] RTPEngine: rtpengine_manage(), Subsequent requests, Transcoding
Carsten Bock writes: > However, this does not seem to apply to the transcoding options. When I > just call "rtpengine_manage()" for a Re-INVITE of a transcoded call (in my > case AMR-WB to G722), the transcoding options are no longer applied. The > forwarded offer does not get the transcoded codecs added (e.g. in my case > G722 is not added to the list of AMR/AMR-WB from the phone). > > Did I misunderstand something or is it a bug? I have never been able to use rtpengine_manage due to reasons I don't anymore remember. I think it had something to do with forking, where each branch had to be handled differently (e.g. supported different rtp protocols, etc.). So, I always add to R-R header appropriate params for in-dialog request handling. In case of transcoding, the params tell from and to codecs. -- Juha ___ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
[SR-Users] RTPEngine: rtpengine_manage(), Subsequent requests, Transcoding
Hi, quick question: If understood it correctly in the past (and it worked for me quite well this way), I can simply call rtpengine_manage() for subsequent requests without adding any additional information (e.g. used interfaces, RTP/SRTP translation or anything like that), as this information is stored in the internal hash table of the RTPEngine module during call setup and initial offer/answer. However, this does not seem to apply to the transcoding options. When I just call "rtpengine_manage()" for a Re-INVITE of a transcoded call (in my case AMR-WB to G722), the transcoding options are no longer applied. The forwarded offer does not get the transcoded codecs added (e.g. in my case G722 is not added to the list of AMR/AMR-WB from the phone). Did I misunderstand something or is it a bug? My RTPEngine is still on 7.2, but I will double check with more recent versions today or tomorrow. However, I also found no commit messages relating to this. Thanks, Carsten -- Carsten Bock I Managing Director ng-voice GmbH Millerntorplatz 1 I 20359 Hamburg I Germany www.ng-voice.com Mobile +49 (0)179-20 21 244 I Direct +49 (0)40-52 47 593-40 I Fax +49 (0)40-52 47 593-99 Sitz der Gesellschaft: Hamburg Registergericht: Amtsgericht Hamburg, HRB 120189 Geschäftsführer: Carsten Bock, Dr. David Bachmann Ust-ID: DE279344284 Hier finden Sie unsere handelsrechtlichen Pflichtangaben: http://www.ng-voice.com/imprint/ ___ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
