[mythtv-users] XvMC Problem and Question

[Brian Wood]

On Feb 10, 2006, at 1:11 PM, Brad Fuller wrote:

> Brian Wood wrote:
>> On Feb 10, 2006, at 12:50 PM, Brad Fuller wrote:
>>
>>
>>> Michael Chmilar wrote:
>>>
>>>> I am using Gentoo x86_64 on an Athlon-64, latest NVidia 81xx  
>>>> driver,
>>>> opengl vsync disabled, Standard XvMC selected in mythfrontend,  
>>>> kernel
>>>> deinterlacing, NVidia fx5200 card.
>>>>
>>>> Playback is smooth. No stuttering when the OSD comes up, but  
>>>> there is
>>>> an audio drop-out for a moment when the OSD appears, and again when
>>>> it disappears.
>>>>
>>>>
>>> Interesting... my audio is perfectly fine, it's just the video that
>>> jumps around until the OSD is gone. And this only happens in "cpu
>>> intensive" HD content.
>>>
>>>> I was getting some stuttering until I checked "enable realtime  
>>>> thread
>>>> priority" and made mythfrontend suid.
>>>>
>>>>
>>> I have "Enable realtime priority threads" checked.
>>>
>>> How do you do run mythfrontend suid. I will search for this in the
>>> archives.
>>>
>>>
>> chmod +s /usr/bin/mythfrontend  (as root)
>>
> Thanks.
> I just tried it. And, when FF the video just freezes and I get the  
> warnings:
> "prebuffering pause"
> over and over. Had to Ctrl-C out of mythfrontend
>
> I also get the warning (when going to HD content):
> "realtime priority would require SUID as root"
>
> After I:
> chmod -s /usr/bin/mythfrontend
>
> Then, no problem (except of course, the original problem of frames  
> that jump around when when the OSD is present. BTW, I tried this on  
> two programs Lost and Dancing with the Stars (both ABC, SF  
> Bayarea)  - both had stuttering audio with the frames. So, I guess  
> I was wrong about saying that the problem was only video)
>
> brad
>
Well there is a warning on the "realtime priority threads" to disable  
it if video freezes on playback.

Guess there's a reason for the warning :-)

What's your CPU load when playing without suid?