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I am trying to mix two rtp streams that I extracted from the pcap of a voip call (using rtpbreak).

Problem is when I mix them ( sox -m) . The audio from the two streams are never in sync. But when I play the streams using wireshark, it is in sync.

Procedure used

  1. let the timestamp of the first packets of the 2 rtp streams(say A and B) be t1 and t2 (t1 > t2).
  2. pad (t1 - t2) amt of time at beginning of A to make stream C
  3. mix B and C.

It would be very helpful if someone could tell me how it is done in Wireshark. Thanks in advance

asked 10 Dec '14, 19:12

nightwatcher's gravatar image

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question asked: 10 Dec '14, 19:12

question was seen: 2,198 times

last updated: 10 Dec '14, 19:12

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