Hi Anders,
good question. I´m not sure but I guess is codec is PCMA G711 8KHz (will take a
look during call setup in a couple of hours).
However "Payload type" is 97 (0x61), and wireshark shows it as "Payload
type=Unknown"
According to the formula, jitter calculation depends on timestamps and arrival
time differences. I don´t know how codec could affect.
BR
Juan
________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ext
Anders Broman (AL/EAB)
Sent: Viernes, 23 de Febrero de 2007 01:05 p.m.
To: Community support list for Wireshark
Subject: SV: [Wireshark-users] Jitter wrong in wireshark?
Hi,
Which codec is used?
Best regards
Anders
________________________________
Från: [EMAIL PROTECTED] genom [EMAIL PROTECTED]
Skickat: fr 2007-02-23 16:53
Till: wireshark-users@wireshark.org
Ämne: [Wireshark-users] Jitter wrong in wireshark?
Hi All,
Below is a rtp analysis from a wireshark 0.99.5 capture in a live
network.
Doing by hand jitter calculation it doesn´t match. And of course, if
below data is real it means we are having jitter of more than 1 minute !!
Exampe: first jitter should be 138.90/16 = 8.68125 [ms] and is showing
8803,82 [ms] !!!
Do someone know what could be wrong or what I´m missing?
BR
Juan
Forward
Packet Sequence Delta (ms) Jitter (ms) IP BW (kbps)
Marker Status Date Length
1 0 0.00 0.00 1.45 [ Ok ] 02/19/2007
18:44:25.915 231
2 1 138.90 8803.82 2.90 [ Ok ] 02/19/2007
18:44:26.053 231
3 2 119.59 17058.61 4.34 [ Ok ]
02/19/2007 18:44:26.173 231
4 3 139.67 24796.21 5.79 [ Ok ]
02/19/2007 18:44:26.313 231
5 4 180.22 32047.69 7.24 [ Ok ]
02/19/2007 18:44:26.493 231
6 5 241.67 38842.10 8.69 [ Ok ]
02/19/2007 18:44:26.735 231
7 6 96.71 45220.93 10.14 [ Ok ]
02/19/2007 18:44:26.831 231
8 7 198.41 51194.72 10.14 [ Ok ]
02/19/2007 18:44:27.030 231
9 8 205.78 56794.69 8.69 [ Ok ]
02/19/2007 18:44:27.235 231
10 9 193.62 62045.42 8.69 [ Ok ]
02/19/2007 18:44:27.429 231
11 10 197.77 66967.72 8.69 [ Ok ]
02/19/2007 18:44:27.627 231
12 11 208.31 71581.72 7.24 [ Ok ]
02/19/2007 18:44:27.835 231
13 12 190.92 75908.43 8.69 [ Ok ]
02/19/2007 18:44:28.026 231
14 13 199.23 79964.20 8.69 [ Ok ]
02/19/2007 18:44:28.225 231
15 14 183.31 83767.48 8.69 [ Ok ]
02/19/2007 18:44:28.409 231
16 15 200.50 87331.98 8.69 [ Ok ]
02/19/2007 18:44:28.609 231
17 16 216.07 90672.73 8.69 [ Ok ]
02/19/2007 18:44:28.825 231
18 17 137.81 93809.57 8.69 [ Ok ]
02/19/2007 18:44:28.963 231
19 18 139.08 96750.28 8.69 [ Ok ]
02/19/2007 18:44:29.102 231
20 19 119.60 99508.41 10.14 [ Ok ]
02/19/2007 18:44:29.222 231
21 20 119.59 102094.16 10.14 [ Ok ]
02/19/2007 18:44:29.341 231
22 21 119.18 104518.33 10.14 [ Ok ]
02/19/2007 18:44:29.460 231
23 22 126.80 106790.51 11.58 [ Ok ]
02/19/2007 18:44:29.587 231
24 23 112.05 108921.60 11.58 [ Ok ]
02/19/2007 18:44:29.699 231
25 24 145.14 110917.43 11.58 [ Ok ]
02/19/2007 18:44:29.844 231
26 25 115.57 112790.36 13.03 [ Ok ]
02/19/2007 18:44:29.960 231
27 26 118.57 114546.05 13.03 [ Ok ]
02/19/2007 18:44:30.079 231
28 27 139.44 116190.71 13.03 [ Ok ]
02/19/2007 18:44:30.218 231
29 28 120.40 117733.77 13.03 [ Ok ]
02/19/2007 18:44:30.338 231
30 29 118.59 119180.49 13.03 [ Ok ]
02/19/2007 18:44:30.457 231
31 30 120.00 120536.71 13.03 [ Ok ]
02/19/2007 18:44:30.577 231
32 31 120.23 121808.15 13.03 [ Ok ]
02/19/2007 18:44:30.697 231
33 32 119.60 123000.17 13.03 [ Ok ]
02/19/2007 18:44:30.817 231
34 33 118.72 124117.74 13.03 [ Ok ]
02/19/2007 18:44:30.936 231
35 34 119.88 125165.39 13.03 [ Ok ]
02/19/2007 18:44:31.055 231
36 35 146.42 126145.90 13.03 [ Ok ]
02/19/2007 18:44:31.202 231
37 36 57.34 118265.37 11.90 SET Incorrect
timestamp 02/19/2007 18:44:31.259 90
Reverse
Packet Sequence Delta (ms) Jitter (ms) IP BW (kbps)
Marker Status Date Length
44 1 0.00 0.00 1.45 [ Ok ] 02/19/2007
18:44:36.119 231
46 2 126.78 99992.08 2.90 [ Ok ]
02/19/2007 18:44:36.246 231
47 3 293.16 193724.25 4.34 [ Ok ]
02/19/2007 18:44:36.539 231
48 4 159.97 281606.49 5.79 [ Ok ]
02/19/2007 18:44:36.699 231
49 5 119.98 363998.58 7.24 [ Ok ]
02/19/2007 18:44:36.819 231
50 6 160.07 441238.67 8.69 [ Ok ]
02/19/2007 18:44:36.979 231
51 7 261.00 513644.94 8.69 [ Ok ]
02/19/2007 18:44:37.240 231
52 8 43.09 481544.82 7.56 SET Incorrect
timestamp 02/19/2007 18:44:37.283 90
_______________________________________________
Wireshark-users mailing list
Wireshark-users@wireshark.org
http://www.wireshark.org/mailman/listinfo/wireshark-users
