VA API has vaPutSurface() to directly render the decoded frame on a drawable, you can refer to the code of mplayer vaapi (git://gitorious.org/vaapi/mplayer.git)
Regards Haihao > You're misunderstanding some concepts. There are two operations that can be > accelerated by GPU: decoding and yuv->rgb converting. First thing can be > achieved by vaapi as you mentioned. Second, by using OpenGL shader(I prefer > OpenGL as it's cross-platform. Other option is to use DirectX on Win > platform) that will convert YUV->RGB and draw converted frame immediately. > > > > 22.12.2012, в 14:15, faeem написал(а): > > > On 22/12/2012 02:53, Carl Eugen Hoyos wrote: > >> faeem <faeem.ali@...> writes: > >> > >> I know of two examples, the va-api code in vlc and the code in a patch for > >> MPlayer, see for example > >> http://thread.gmane.org/gmane.comp.video.mplayer.devel/61734/focus=61744 > >> [...] > > Thanks. I'll be looking into those examples ASAP. > > > >>> // FIXME use direct rendering > >>> > >>> I need to know how to fix that FIXME. > >> This is not related to va-api at all. > > I selected that //FIXME because it specified "direct rendering", which I > > took to mean "handled by the GPU". It seems I was mistaken there. > > > > My conceptual understanding of va-api thus far, within the ffmpeg > > framework, is that libavcodec will read an encoded video frame, then use > > va-api and the GPU to perform decoding of that frame instead of performing > > decoding in software. > > > > The end result will probably be a frame in YUV. I'll need to run the YUV to > > RGB conversion on each frame if I'm running OpenGL and this will still be > > CPU intensive. I would benefit from the hardware frame decoding though, and > > that alone should make a significant difference. > > > > Is this correct? > > > > Faeem > > > > _______________________________________________ > > Libav-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/libav-user > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
