In article <[EMAIL PROTECTED]>, I wrote: > In article <[EMAIL PROTECTED]>, > Michael Manousos <[EMAIL PROTECTED]> wrote: > > > > Can you get an ethereal trace on a call with that problem? > > Run an RTP analysis on the captured stream (Tools Menu) and save > > the contents of the RTP packets in audio files. Then check if > > the playback of these files is normal or not. > > Aha, sounds like Ethereal has even more clever features - I didn't > know it could do that. > > Fortunately, I've been running a continuous tcpdump capture on the > Asterisk box of the traffic between it and the switch. I'll see > what Ethereal thinks of it.
Hi Michael, I've now done some RTP analysis of affected streams, and have found that the times when we get the audio flutter correspond with parts of the analysis showing repeated packets in the RTP stream. This only happens on the outgoing stream; the incoming stream from the switch is perfect. When a packet is repeated, it is identical to the previous and occurs about 7 to 14 microsec after, as if something in the software has decided to send the packet twice in immediate succession. I've pasted below an extract from the CVS file saved from the RTP stream analysis. I also saved the payload (pity it converts it to uLaw instead of saving it in the stream's native format) and listened to it to confirm the periods of distortion. I would assume the problem is somewhere in the depths of openh323, but any pointers in the right direction would be appreciated! Cheers Tony Here is the CSV extract: Packet,Sequence,Delay (s),Jitter (s),Marker,Status,Date,Length 144209,17353,0.020000,0.000003,,[ Ok ],05/17/2005 17:05:48.420,214 144225,17354,0.020006,0.000003,,[ Ok ],05/17/2005 17:05:48.440,214 144226,17354,0.000007,0.000003,,Wrong sequence nr.,05/17/2005 17:05:48.440,214 144244,17355,0.019987,0.000004,,[ Ok ],05/17/2005 17:05:48.460,214 144260,17356,0.019998,0.000004,,[ Ok ],05/17/2005 17:05:48.480,214 144261,17356,0.000008,0.000004,,Wrong sequence nr.,05/17/2005 17:05:48.480,214 144276,17357,0.019991,0.000004,,[ Ok ],05/17/2005 17:05:48.500,214 144296,17358,0.019992,0.000004,,[ Ok ],05/17/2005 17:05:48.520,214 144298,17358,0.000009,0.000005,,Wrong sequence nr.,05/17/2005 17:05:48.520,214 144313,17359,0.019990,0.000005,,[ Ok ],05/17/2005 17:05:48.540,214 144329,17360,0.020000,0.000005,,[ Ok ],05/17/2005 17:05:48.560,214 144349,17361,0.019992,0.000005,,[ Ok ],05/17/2005 17:05:48.580,214 144368,17362,0.020003,0.000005,,[ Ok ],05/17/2005 17:05:48.600,214 144369,17362,0.000006,0.000005,,Wrong sequence nr.,05/17/2005 17:05:48.600,214 144383,17363,0.019990,0.000005,,[ Ok ],05/17/2005 17:05:48.620,214 144401,17364,0.019995,0.000005,,[ Ok ],05/17/2005 17:05:48.640,214 144417,17365,0.020001,0.000005,,[ Ok ],05/17/2005 17:05:48.660,214 144432,17366,0.019994,0.000005,,[ Ok ],05/17/2005 17:05:48.680,214 144452,17367,0.019997,0.000005,,[ Ok ],05/17/2005 17:05:48.700,214 144469,17368,0.020002,0.000005,,[ Ok ],05/17/2005 17:05:48.720,214 144486,17369,0.019998,0.000005,,[ Ok ],05/17/2005 17:05:48.740,214 144487,17369,0.000008,0.000005,,Wrong sequence nr.,05/17/2005 17:05:48.740,214 144506,17370,0.019985,0.000005,,[ Ok ],05/17/2005 17:05:48.760,214 144523,17371,0.019999,0.000005,,[ Ok ],05/17/2005 17:05:48.780,214 144540,17372,0.020005,0.000005,,[ Ok ],05/17/2005 17:05:48.800,214 144559,17373,0.019992,0.000005,,[ Ok ],05/17/2005 17:05:48.820,214 144560,17373,0.000008,0.000005,,Wrong sequence nr.,05/17/2005 17:05:48.820,214 144576,17374,0.019988,0.000006,,[ Ok ],05/17/2005 17:05:48.840,214 144577,17374,0.000007,0.000006,,Wrong sequence nr.,05/17/2005 17:05:48.840,214 144592,17375,0.019992,0.000006,,[ Ok ],05/17/2005 17:05:48.860,214 144593,17375,0.000008,0.000006,,Wrong sequence nr.,05/17/2005 17:05:48.860,214 144610,17376,0.019987,0.000007,,[ Ok ],05/17/2005 17:05:48.880,214 144627,17377,0.019997,0.000006,,[ Ok ],05/17/2005 17:05:48.900,214 144628,17377,0.000008,0.000006,,Wrong sequence nr.,05/17/2005 17:05:48.900,214 144642,17378,0.019989,0.000007,,[ Ok ],05/17/2005 17:05:48.920,214 144661,17379,0.019997,0.000007,,[ Ok ],05/17/2005 17:05:48.940,214 144678,17380,0.020004,0.000006,,[ Ok ],05/17/2005 17:05:48.960,214 144679,17380,0.000009,0.000007,,Wrong sequence nr.,05/17/2005 17:05:48.960,214 144695,17381,0.019988,0.000007,,[ Ok ],05/17/2005 17:05:48.980,214 144696,17381,0.000007,0.000007,,Wrong sequence nr.,05/17/2005 17:05:48.980,214 144713,17382,0.019982,0.000008,,[ Ok ],05/17/2005 17:05:49.000,214 144732,17383,0.020002,0.000007,,[ Ok ],05/17/2005 17:05:49.020,214 144733,17383,0.000008,0.000007,,Wrong sequence nr.,05/17/2005 17:05:49.020,214 144747,17384,0.019989,0.000008,,[ Ok ],05/17/2005 17:05:49.040,214 144768,17385,0.020000,0.000007,,[ Ok ],05/17/2005 17:05:49.060,214 144769,17385,0.000007,0.000007,,Wrong sequence nr.,05/17/2005 17:05:49.060,214 144784,17386,0.019986,0.000007,,[ Ok ],05/17/2005 17:05:49.080,214 144801,17387,0.020001,0.000007,,[ Ok ],05/17/2005 17:05:49.100,214 144802,17387,0.000008,0.000007,,Wrong sequence nr.,05/17/2005 17:05:49.100,214 144820,17388,0.019987,0.000007,,[ Ok ],05/17/2005 17:05:49.120,214 144836,17389,0.020001,0.000007,,[ Ok ],05/17/2005 17:05:49.140,214 144852,17390,0.019994,0.000007,,[ Ok ],05/17/2005 17:05:49.160,214 144854,17390,0.000008,0.000007,,Wrong sequence nr.,05/17/2005 17:05:49.160,214 144872,17391,0.019990,0.000007,,[ Ok ],05/17/2005 17:05:49.180,214 144891,17392,0.019995,0.000007,,[ Ok ],05/17/2005 17:05:49.200,214 144907,17393,0.019999,0.000007,,[ Ok ],05/17/2005 17:05:49.220,214 144926,17394,0.019996,0.000007,,[ Ok ],05/17/2005 17:05:49.240,214 144942,17395,0.020001,0.000006,,[ Ok ],05/17/2005 17:05:49.260,214 144958,17396,0.019993,0.000006,,[ Ok ],05/17/2005 17:05:49.280,214 144976,17397,0.019999,0.000006,,[ Ok ],05/17/2005 17:05:49.300,214 144992,17398,0.019995,0.000006,,[ Ok ],05/17/2005 17:05:49.320,214 145008,17399,0.019999,0.000006,,[ Ok ],05/17/2005 17:05:49.340,214 145026,17400,0.019996,0.000005,,[ Ok ],05/17/2005 17:05:49.360,214 145042,17401,0.019999,0.000005,,[ Ok ],05/17/2005 17:05:49.380,214 145059,17402,0.020001,0.000005,,[ Ok ],05/17/2005 17:05:49.400,214 145079,17403,0.019993,0.000005,,[ Ok ],05/17/2005 17:05:49.420,214 145097,17404,0.020003,0.000005,,[ Ok ],05/17/2005 17:05:49.440,214 145098,17404,0.000007,0.000005,,Wrong sequence nr.,05/17/2005 17:05:49.440,214 145113,17405,0.019987,0.000006,,[ Ok ],05/17/2005 17:05:49.460,214 145131,17406,0.019996,0.000005,,[ Ok ],05/17/2005 17:05:49.480,214 145147,17407,0.019997,0.000005,,[ Ok ],05/17/2005 17:05:49.500,214 145163,17408,0.020002,0.000005,,[ Ok ],05/17/2005 17:05:49.520,214 145182,17409,0.019993,0.000005,,[ Ok ],05/17/2005 17:05:49.540,214 145198,17410,0.020000,0.000005,,[ Ok ],05/17/2005 17:05:49.560,214 145215,17411,0.019997,0.000005,,[ Ok ],05/17/2005 17:05:49.580,214 145235,17412,0.019998,0.000005,,[ Ok ],05/17/2005 17:05:49.600,214 145251,17413,0.019999,0.000004,,[ Ok ],05/17/2005 17:05:49.620,214 145267,17414,0.019996,0.000004,,[ Ok ],05/17/2005 17:05:49.640,214 145287,17415,0.019999,0.000004,,[ Ok ],05/17/2005 17:05:49.660,214 145303,17416,0.019996,0.000004,,[ Ok ],05/17/2005 17:05:49.680,214 145320,17417,0.020000,0.000004,,[ Ok ],05/17/2005 17:05:49.700,214 145321,17417,0.000008,0.000004,,Wrong sequence nr.,05/17/2005 17:05:49.700,214 145341,17418,0.019989,0.000005,,[ Ok ],05/17/2005 17:05:49.720,214 145342,17418,0.000007,0.000005,,Wrong sequence nr.,05/17/2005 17:05:49.720,214 145358,17419,0.019992,0.000005,,[ Ok ],05/17/2005 17:05:49.740,214 145373,17420,0.019998,0.000005,,[ Ok ],05/17/2005 17:05:49.760,214 145392,17421,0.019995,0.000005,,[ Ok ],05/17/2005 17:05:49.780,214 145409,17422,0.019996,0.000005,,[ Ok ],05/17/2005 17:05:49.800,214 145425,17423,0.019999,0.000004,,[ Ok ],05/17/2005 17:05:49.819,214 145444,17424,0.019995,0.000005,,[ Ok ],05/17/2005 17:05:49.839,214 145461,17425,0.020002,0.000004,,[ Ok ],05/17/2005 17:05:49.859,214 145462,17425,0.000008,0.000005,,Wrong sequence nr.,05/17/2005 17:05:49.860,214 145476,17426,0.019986,0.000005,,[ Ok ],05/17/2005 17:05:49.879,214 145497,17427,0.020000,0.000005,,[ Ok ],05/17/2005 17:05:49.899,214 145498,17427,0.000008,0.000005,,Wrong sequence nr.,05/17/2005 17:05:49.899,214 145513,17428,0.019987,0.000006,,[ Ok ],05/17/2005 17:05:49.919,214 145531,17429,0.019998,0.000005,,[ Ok ],05/17/2005 17:05:49.939,214 145532,17429,0.000009,0.000006,,Wrong sequence nr.,05/17/2005 17:05:49.939,214 145550,17430,0.019986,0.000006,,[ Ok ],05/17/2005 17:05:49.959,214 145569,17431,0.020006,0.000006,,[ Ok ],05/17/2005 17:05:49.979,214 145570,17431,0.000008,0.000006,,Wrong sequence nr.,05/17/2005 17:05:49.979,214 145584,17432,0.019983,0.000007,,[ Ok ],05/17/2005 17:05:49.999,214 145605,17433,0.020002,0.000007,,[ Ok ],05/17/2005 17:05:50.019,214 145606,17433,0.000008,0.000007,,Wrong sequence nr.,05/17/2005 17:05:50.019,214 145621,17434,0.019984,0.000007,,[ Ok ],05/17/2005 17:05:50.039,214 145638,17435,0.020003,0.000007,,[ Ok ],05/17/2005 17:05:50.059,214 145639,17435,0.000008,0.000007,,Wrong sequence nr.,05/17/2005 17:05:50.059,214 145656,17436,0.019984,0.000008,,[ Ok ],05/17/2005 17:05:50.079,214 145673,17437,0.019997,0.000007,,[ Ok ],05/17/2005 17:05:50.099,214 145689,17438,0.019998,0.000007,,[ Ok ],05/17/2005 17:05:50.119,214 145708,17439,0.019999,0.000007,,[ Ok ],05/17/2005 17:05:50.139,214 145725,17440,0.019997,0.000006,,[ Ok ],05/17/2005 17:05:50.159,214 -- Tony Mountifield Work: [EMAIL PROTECTED] - http://www.softins.co.uk Play: [EMAIL PROTECTED] - http://tony.mountifield.org _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users