[AG-TECH] Audio and Video Syncronization

Lisa Childers childers at mcs.anl.gov
Thu Jun 28 16:36:11 CDT 2001

Also you might try setting the minimum/maximum playout delays to their
lowest setting under the rat Reception options and limit playout delay.

Are you running 16-kHz Mono?


-----Original Message-----
From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov]On
Behalf Of Robert Olson
Sent: Thursday, June 28, 2001 4:21 PM
To: Will, Rodger (R.); Ag-Tech (E-mail)
Cc: 'Markus Buchhorn'
Subject: RE: [AG-TECH] Audio and Video Syncronization

I was watching a session today closely, and am seeing very tight synch
between audio and video. This is with audio on a Linux box with an
ES1370-based PCI128 card, and video on an Athlon win2k box..

I suspect again your problem is some combination of some network loss,
causing rat to increase its buffering, and the use of the SB Live, which
induces higher latency anyway due to a large fragement size.

We should do some testing online sometime, and see if others are also
seeing the badness.


At 06:01 AM 6/27/2001 -0400, Will, Rodger (R.) wrote:
>I am very new to this technology, but I assumed that with vic and rat
>being independent programs, that sync would be a challenge.
>One of our nodes employs an automatic camera/microphone system that
>switches vic's input to the active speaker's camera and microphone. I
>would assume that this effect would be akin to high-motion.
>I will watch the stats today, and pass along the information.
>I agree that someone urgently needs to solve this problem in software.

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