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. -- #163933
