[mythtv-users] Just how great can VDPAU be?

George Mari george_mythusers at mari1938.org
Sat Nov 29 15:52:58 UTC 2008


Scott D. Davilla wrote:
>>  >Has anyone been able to test on a P4 based system with a good old
>>> fashion PCI card?  My quick search of Newegg didn't find any AGP 8xxx
>>> or newer cards, but I did find PCI cards.
>>>
>>> http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2000380048%201305520548%201069609642%20106791921&name=GeForce%208%20series
>>>
>>> Here's hoping that my MythTV system built from old parts may be 
>>> able to do HD.
>>> -Mark
>> ooohhh, been looking for a PCI 8400 to test VDPAU on the Intel dual
>> core atom 330 ITX motherboard. Thanks. If this works, $80 for the
>> atom 330 mb, $60 for the video card, +case and ps == real cheap 1080p
>> capable media center.
> 
> Just an update to testing VDPAU under the atom 330 and a PCI nvidia 
> 8400. All I can say is WOW. H.264 video content that took 45 and 160 
> percent CPU under the atom 330 without VDPAU takes less than 5 
> percent cpu with VDPAU. Not a type, that's really less than 5 
> percent. VDPAU == very cool.
> 

That's very interesting - thanks for the update.

What's the "watchability" like with that PCI Nvidia 8400?  Any 
stuttering?  What resolution and bitrate of H.264 content were you 
testing with?

This could open up some options for people with older hardware that only 
has AGP for video, not to mention lower-power (wattage) hardware, like 
you seem to pursuing with the Intel Atom.  I could use a PCI 8xxx video 
card in place of an AGP card, and still get watchable performance on 
Hi-def H.264 content, in theory.

 From the notes on the patch that Isaac submitted, it looks like MPEG2 
video is still not-quite visuallyoptimal, but that's probably just a 
matter of time before that gets smoothed out.


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