Re: A/V sync issues in cluster mode

On Apr 13, 2009, at 3:55, Ron Yorgason <[email protected]> wrote:

> I've built up a fancy cluster with 24 cpu cores to process large DVD
> collections.  I'm starting to get frustrated with the results.  If I
> process the entire movie on a single node, the resulting video looks
> and sounds great.  If I process it with the cluster, the audio gets
> out of sync with the video.  I see directories left over in avi/001,
> like audio-psu-00 and chunks-psu-00.  It seems like bits were left
> during the merging process and the result is A/V sync issues.
>
> I'm using Ubuntu 8.10 w/ 0.98.6-0.0ubuntu2 on most of the computers,
> but one system is running CentOS5 with 0.98.7.  Is the version
> mismatch between the nodes causing me problems? Or are A/V sync issues
> common in cluster mode?  I could just run all these systems as single
> DVD ripping stations, but I think I'd get much better utilization if I
> could run the jobs in parallel across the cluster.
>
> --Ron
>

I doubt it is a version mismatch issue.
I had similar problems in a cluster where all noded were ubuntu 8.04  
with latest updates. In my case some segments were without audio. I  
have fallen back to stand alone processing and had no problems.

Cheers
Nicola