Hi Nanang, Thanks alot. This seems to be different method from which wireshark is using , wireshark uses (sum of all deltas) / no of packets. In this file aaa.cap attached , in Statitics ---> RTP--> show all streams, it shows means Jitter 18.09. Your method defined above doesn't give same values . And in another file mean_calc.pcap ,from (172.26.1.101 --> 172.26.1.104 ) it calculates mean with different method.(Mean value is 1.28 ). I dont have any idea over that ? Does this wireshark uses some different calculation methodology for calculating mean for different no of packets or I am missing something ? Coz all are using different method for calculation so i am confused over it . Thanks & Regards, Ravi On Mon, Jun 16, 2008 at 1:43 PM, Nanang Izzuddin <nanang at pjsip.org> wrote: > Hi Ravi, > > Yes, that is mean jitter, but it seems you are using 0.8.0, no > standard deviation jitter calculation in that version. If you work > with the latest SVN source, you will get both calculations: mean > jitter & standard deviation, even some report blocks of RTCP XR are > already implemented (stats summary is one of them). > > Cheers, > nanang > > > 2008/6/16 Ravi Inder Singh <raviinder at gmail.com>: > > Hi Benny, > > I need to calculate Mean Jitter & Deviation Jitter , as per RFC 3611 > > section 4.6 Stats Summary Block > > Is this calculation below is mean jitter > > sess->avg_jitter = > > (jitter + sess->avg_jitter * sess->stat.rx.jitter.count) / > > (sess->stat.rx.jitter.count + 1); > > > > And also Standard deviation jitter for the same. > > > > > > -- > > Thanks & Regards, > > Ravi Inder Singh > > _______________________________________________ > > 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 > > > > > > _______________________________________________ > 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 > -- Thanks & Regards, Ravi Inder Singh -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080616/583be0b7/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: aaa.pcap Type: application/octet-stream Size: 111077 bytes Desc: not available Url : http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080616/583be0b7/attachment-0002.obj -------------- next part -------------- A non-text attachment was scrubbed... Name: mean_calc.pcap Type: application/octet-stream Size: 58416 bytes Desc: not available Url : http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080616/583be0b7/attachment-0003.obj
