[Asterisk-video] Synchronization problem between Voice and Video

[tech at i6net.com]

Hola Sergio,

The video clip have 10 fps.
This generate H263 RTP trames with timestamp incremented by 9000.
Every 9000 a have the related trames (one or more) from the frame.


No.     Time        Source                Destination           Protocol Info
   1885 15.855254   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41604, Time=1390410, MarkMODE A H263
payload (PSC)
   1896 15.956293   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41605, Time=1399410, MarkMODE A H263
payload (PSC)
   1908 16.057178   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41606, Time=1408410, MarkMODE A H263
payload (PSC)
   1918 16.155226   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41607, Time=1417410, MarkMODE A H263
payload (PSC)
   1930 16.255798   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41608, Time=1426410, MarkMODE A H263
payload (PSC)
   1940 16.354994   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41609, Time=1435410, MarkMODE A H263
payload (PSC)
   1951 16.455823   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41610, Time=1444410, MarkMODE A H263
payload (PSC)
   1962 16.555171   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41611, Time=1453410, MarkMODE A H263
payload (PSC)
   1973 16.656598   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41612, Time=1462410, MarkMODE A H263
payload (PSC)
   1984 16.755210   192.168.1.252         192.168.1.2           H.263    Payload
type=ITU-T H.263, SSRC=329143181, Seq=41613, Time=1471410, MarkMODE A H263
payload (PSC)

i6net


Selon Sergio García Murillo <Sergio.Garcia at ydilo.com>:

> tech at i6net.com wrote:
> > Hello guys,
> >
> > I have made a tool to convert a 3gp file to a wav and h263(asterisk
> > format with payload).
> > With long clips (more than 1mn), I loose the Voice/Video
> > synchronisation .
> > Each Video packet have a timestamp, it seems to be relative, and
> > there is no correction to correct the time lost (by the scheduling
> > system).
>
> Are you sure the timestamps are correct?
> How many fps is the video and what are the timestamp values?
>
> Greetings
> 	Sergio
>
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