[mythtv-users] 1080i problem

Xiaotian Sun sun.xiaotian at gmail.com
Thu May 5 20:08:09 UTC 2005


I just built a Pundit-R with P4 3.0 GHz HT running 2.6.11 smp kernel
from FC3.  I'm using radeon driver and got >2000 fps when testing
using glxgears.  So I think why bother to switch to the ATI driver.

Anyways, 720p HD stream plays fine.  No problem at all.  CPU usage around 50%.  

But I got a serious problem when playing 1080i stream.  about 1/3 of
the image at the right hand side is just a purple rectangule.  Even
the OSD gets cut off in that area.  CPU usage for mythfrontend is
close to 100%, although the total CPU usage is around 80%, X is using
about 50% of CPU on the other processor.  And the "prebuffering pause"
error is spit out continuously.

I couldn't figure out what's the causes, the CPU, the video card (ATI
Radeon 9100 IGP), or the memory size (I only have 512MB, of which 32MB
is reserved for the video card).  I used to be able to play 1080i fine
on my other desktop with a P4 2.4 GHz CPU and nVidia FX5200 video

Any help is highly appreciated.



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