[mythtv-users] MYthTV Playback is Choppy

[Jos Hoekstra]

Brian Schmidt schreef op 7-4-2009 16:04:
> I'm running the latest stable MythTV updated via yum on a Fedora Core 10 
> box. The machine is a Shuttle PC that is multiple years old. It has the 
> nForce2 chipset. I'm running the latest 96.43 Nvidia drivers also 
> updated via yum. The TV output is functional and is using the Nvidia 
> drivers (the Nvidia logo appears as X starts). I'm running Xorg and 
> Gnome. I have a Hauppage HVR-1600 installed and I'm receiving 
> over-the-air ATSC digital broadcasts in NTSC format.
>  
> At first I thought the issue was the CPU and memory of my older system. 
> However, I can record shows without issue and I can play them back 
> without issue using mplayer. The only time my playback is choppy is when 
> I use Myth to play the recorded TV show back. I've been searching 
> through the mailing list archives and other forums for a few weeks, but 
> I haven't been able to resolve the issue. My best results have come when 
> having Myth configured to use libmpeg for decoding and chromakey for the 
> OSD. I've tried different deinterlacers and I've had mixed results. I've 
> also followed the Optimizing Performance on the Myth wiki along with the 
> "Hacking MythTV" book.
>  
> Another thing to note is that I can't seem to set any resolution other 
> than 1024. This box is for my parents and they do not have an HD TV, so 
> I'm fine with running a lower res and was hoping that might help, but X 
> refuses and keeps automatically switching back to 1024.
>  
> I appreciate any help that anyone can offer me. Previously, this system 
> was up and running using an older version of Myth and a Hauppage 
> analog-only card.
>  
> Thanks,
> Brian

Try another playback profile, the default selected on mythbuntu was not 
working well for my frontend. I don;t have the material you use, but i 
might be a good starting point.

Regards,

Jos