[mythtv-users] Video jitter possibly cased by low cpu usage

[Jean-Yves Avenard]

On Monday, December 16, 2013, Marius Schrecker wrote:

>
> Hi,
>
>     After recenrt updates (I'm not sure what) I'm noticing slightly more
> jerkyness and jitter on some videos and (possibly unrelated) wandering
> audio sync on others.
>
> System is a dual core opteron with nvidia 620 video adapter doing vdpau
> rendering and jitterometer tells me that when playing affected  full
> 1080 at 25p  content frame rate varies at +- 1-2 Hz of 25 and both CPU cores
> are running at around 15% capacity.
> One of my recent changes was upgrading the Nvidia driver from 304 to 310
> and google tells me that teghre was a substantial performance increase
> bertween these two drivers. Something that might be causing my CPU usage
> and bus speed to drop so much that I'm getting throughput errors.
>
> What's the best way to test the hypothesis?
>
> Cheers!
>
>
Are you sure you're using vdpau?
If not; use one of the vdpau playback profile.With a 620; vdpau high
quality should do.

There should be no need to fiddle with CPU frequencies when you use vdpau.
Not with any recent drivers or intel proc (only amd had issues)


> Marius
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20131217/35c147d1/attachment.html>