Hi Anshuman, I tried revision 1805 on my PC at clock rate 16kHz codec PCMU (note: conference.c last modified was on rev 1715, so we should have same conference code). On silence, packets are sent every about 1 second. When not silence, the intervals are 4ms, 27ms, 28ms, 4ms, 27ms, 28ms, ... (repeated with small +/-) however this should be acceptable and normalizable by common jitter buffer. However I experienced a bit shock that it happened as you mentioned. But then I realized that I put wrong wireshark setting on time display format. After I set time display format to 'since previous displayed packet' and put display filter (one direction only), the result is as I mentioned above. nanang On 20/02/2008, Anshuman S. Rawat <arawat at 3clogic.com> wrote: > > Hi Benny, > > From our wireshark/ethereal reports we were seeing RTP packets being sent > out consistently at 10ms intervals instead of 20ms which is what ptime > is (with G729 & G711 codecs - did not try any other codec). As it turned out > that RTP packets were sent at 10ms intervals when silence was detected and > 20ms when audio is detected. > > The issue was traced to the write_port() in conference.c. Seems like > resampling is not done for silence/null frames and sent directly over the > wire resulting in a RTP packet every 10ms. Though this did not cause any > noticeable voice quality issue but it will definitely cause serious impact > on the receiver's JB. Note - clock rate for conf bridge is 16000. > > This looks like a bug to us. We are at revision 1738 so not sure if this > has been fixed in a later revision. Or is it intended to do exactly as > reported above? If yes, why? > > Thanks, > Anshuman > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080220/1fb63bb1/attachment.html
