[mythtv-users] Problems with vdpau decoding HD content

[Brent Bolin]

On Thu, May 13, 2010 at 3:42 PM, Brian Long <briandlong at gmail.com> wrote:
> On Thu, May 13, 2010 at 1:14 AM, Scott <list-mythtv at bluecamel.eml.cc>
wrote:
>>
>> This is a general query to help me with my troubleshooting of a playback
>> problem on my FE.
>>
>> I have an ASRock 330 ION loaded with Mythbuntu 10.04 and the 0.23-fixes
>> SVN 24572. The system uses the VDPAU Normal profile and is configured for
>> 512MB of GPU RAM in BIOS.
>>
>> Playback with both recorded 720p and 1080i (OTA ATSC from a HDHR) shows
>> seems to run into a glitch. The show starts off fine and pausing, FF/RW,
and
>> commercial skip all work fine. At some point, usually 12-30 minutes, the
>> video starts jumping and sometimes the audio too. I see "prebuffering
pause"
>> messages logged in mythfrontend.log.
>
> Are you sure the ASRock is not overheating?  I had problems on my Zotac
> ION-ITX Atom 230 board with passive cooling.  Any time I ran 1080i content
> with a deinterlacer, it appears the GPU would scale back due to heat.
This
> would cause the image to jerk, etc.
>
> I ended up installing a small 40mm fan in the Mini-Box M350 case I am
using
> and I've not had jerky video since.  FYI, to my knowledge, only kernel
> 2.6.32 has the needed modules to check ION GPU and/or CPU temperature with
> lm-sensors.
>
> /Brian/
>
>
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>

I've have the same issue.  With 3 separate Zotac atom dual core 330.  The
response I got from the list was to try custom filters.  Didn't help.  When
I use "High Quality" all problems go away.  This is specifically for OTA HD
recordings.

Interesting to note when viewing ripped DVD's using handbrake the VDPAU
settings are good.

I have wondered if CPU starving could be the issue.  Top shows very low cpu
usage 3-4% when using VDPAU settings.  I think all the reading I have done
in regards to cpu throttling are for AMD.
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