Wireshark · Wireshark-users: Re: [Wireshark-users] Calculate Jitter

[Goran Štrok <goran.strok@xxxxxxxxx>]

Title: Re: [Wireshark-users] Calculate Jitter

In this example:
http://wiki.wireshark.org/SampleCaptures#head-6f6128a524888c86ee322aa7cbf0d7b7a8fdf353
file: aaa.pcap
In the second stream (SSRC = 932629361, codec = G.711...).
When I analyze this RTP stream I see:
first packet: delta = 0,00 ms; jitter = 0,00 ms
second packet: delta = 69,95 ms; jitter = 3,12 ms
third packet: delta = 3,53 ms; jitter = 3,96 ms
...

If I calculate this for second packet:  J = (69,95 - 0) - (20 - 0) = 49,95 ms
                    for third packet :  J = (3,53 - 69,95) - (40 - 20) = - 86,42 ms

Something must be vrong here...
Please help.