[Asterisk-video] Synchronization problem between Voice and Video

[tech at i6net.com]

I will send 2 URL of a WAV file and a H263 file of a long clip.
I think you will see what I mean.


i6net


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

> The timestamps and fps are correct (9000/90000) = 10 fps, and the are sent at
> the correct time, each 100ms so I think that the everthing is perfect on the
> asterisk video side....
>
>
>
> -----Original Message-----
> From: tech at i6net.com [mailto:tech at i6net.com]
> Sent: martes, 18 de julio de 2006 22:07
> To: Development discussion of video media support in Asterisk; Sergio García
> Murillo
> Cc: Development discussion of video media support in Asterisk
> Subject: RE: [Asterisk-video] Synchronization problem between Voice and Video
>
> 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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