Am Sonntag, 15. April 2012, 16:54:58 schrieb Michael Mol:
> On Sun, Apr 15, 2012 at 4:45 PM, Volker Armin Hemmann
> 
> <volkerar...@googlemail.com> wrote:
> > Am Sonntag, 15. April 2012, 16:44:43 schrieb Florian Philipp:
> >> Am 15.04.2012 16:22, schrieb Michael Mol:
> >> > On Sun, Apr 15, 2012 at 10:09 AM, Florian Philipp
> >> > <li...@binarywings.net>
> > 
> > wrote:
> >> >> Am 15.04.2012 15:18, schrieb Walter Dnes:
> >> >>> On Wed, Apr 11, 2012 at 06:30:02PM +0200, Volker Armin Hemmann wrote
> >> >>> 
> >> >>>> Am Mittwoch, 11. April 2012, 02:11:35 schrieb Walter Dnes:
> >> >>>>>   If it's PCIe, so be it.  Actually, a post that prevents me
> >> >>>>> wasting
> >> >>>>> 
> >> >>>>> money is helpful <G>.  Would PCIe be significantly better on the
> >> >>>>> same
> >> >>>>> CPU+GPU, or is it hype?
> >> >>>> 
> >> >>>> a lot, lot lot lot better. No hype.
> >> >>> 
> >> >>>   I've done some looking, and I'm back with more questions.  I've
> >> >>> also
> >> >>> 
> >> >>> read the Nouveau-versus-NVIDIA thread.  Questions...
> >> >>> 
> >> >>> 1) Will PCIe 2.0 cards work in a PCIe 1.0 slot?  I'm not expecting
> >> >>> 2.0
> >> >>> performance, I just want full backwards compatability.  PCIe 1.0
> >> >>> cards
> >> >>> seem to be rare, and have to be ordered online, while I can pick up a
> >> >>> 2.0 card locally at a store.
> >> >> 
> >> >> PCIe-2.0 is fully downward compatible to 1.1 and 1.0.
> >> >> 
> >> >>> 2) My main "torture test" will be HD fullscreen video.  Will there be
> >> >>> major improvement in that?  That's 2D.  Forget 3D.
> >> >> 
> >> >> 2D video is still rendered using OpenGL if your video player supports
> >> >> it.
> >> > 
> >> > I'm not aware of any video decoders using CUDA, OpenCL, or pixel
> >> > shaders for video decoding; AFAIK, unless you're using VDPAU you're
> >> > still using the CPU to render the video to a frame buffer. The most a
> >> > video player is going to use OpenGL for is stretching that frame
> >> > buffer to fit a window or screen, and possibly as a compositor to
> >> > place overlays like subtitles or playback control elements..
> >> 
> >> Agreed. Decoding is still usually done in software but offloading
> >> scaling and YUV to RGB conversion helps none the less. Mplayer, for
> >> example, allows a lot of customization depending on the amount of
> >> texture units. With high resolution displays and slow CPUs, this can
> >> have surprisingly large effects.
> > 
> > and with vlc you can use vaapi which can make use of the video decoding
> > engine of the graphic chip.
> > 
> > If the movie is using the right codec, of course.
> 
> Also depends on whether or not the graphics driver and vaapi like each
> other. I'm not aware of NVidia cards supporting VA API yet.
> 
> VA API is pretty new; it'll be interesting to see where it goes, and I
> hope it takes hold. Right now, the most tested and working solutions,
> AFAIK, are nVidia cards and VDPAU. At least, that combination has been
> working well for me for 3-4 years.

va-api can use vdpau as backend ;)

I am not using nvidia anymore and some time ago vaapi-xvba started to work for 
mp4.

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