[mythtv-users] Video Stutter Problems

Thomas W. Shelton twshelton at hrtoolbox.com
Wed Jan 18 17:06:19 UTC 2006


Yes DMA is enable ... I was getting writes of about 50m/sec when I
tested.

I'll disable OpenGL and recompile with some optimizations.  I'm running
Kubuntu ... Any thoughts on where to find optimizations ?

Thanks for the help ...

Thomas 

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Jerry Rubinow
Sent: Wednesday, January 18, 2006 10:59 AM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Video Stutter Problems

On 1/18/06, Thomas W. Shelton <twshelton at hrtoolbox.com> wrote:
>
> Hello,
>
> I have scoured the list and the Internet and discovered a lot of good 
> information ... none of which has corrected my problem.
>
> I'm running on
>
>  - Dell 2.4GHz/512M ram
>  - pcHDTV 3000 Card
>  - nVidia GeForce FX 5200
>  - using NTSC with cable -- no cable box.
>  - Have Video for Linux card specified -- not the pcHDTV(wanted to get

> the basics working first)
>
> using the latest stable branch from SVN compiled with --enable-Xvmc.  
> I have "v4l" defined in my xorg.conf file.  I also have Xvmc defined
in the setup.
> I believe I have also turned off all commercial flagging.  (specifics 
> of which settings to check might help).  The processor also spikes 
> when I run glxgears ... not sure if that means anything.
>
> When I started the image quality was terrible.  I have been able to 
> significantly improve the quality but it still stutters.  I ran "top" 
> and both mythbackend and mythfrontend are consuming all available 
> resources when watching TV.
>
> I feel like I'm making improvements but have run into a wall.
>
> Any thoughts?

For the backend, dumb question - is dma enabled on the disk(s)?

For the frontend, I had to recompile with processor specific
optimizations before I got reasonable CPU usage.

YMMV.

-Jerry


More information about the mythtv-users mailing list