[Asterisk-video] Synchronization problem between Voice and Video

[Sergio García Murillo]

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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for the use of the individual or entity to whom they are addressed. No confidentiality 
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If you have received this message in error, please immediately destroy it and kindly 
notify the sender by reply email.
You must not, directly or indirectly, use, disclose, distribute, print, or copy any 
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other information in this message that do not relate to the official business of 
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