Hi, 2014-08-14 7:06 GMT+02:00 Alexey <warpd...@gmail.com>:
> I try find simple example for decode h264 and fail. If someone have please > share. There are plenty of examples around. * hwdecode-demos, which shows off various ways to use HW decode acceleration for a single frame: <http://gitorious.org/hwdecode-demos/hwdecode-demos/> * gstreamer-vaapi, a set of GStreamer plug-ins: <http://gitorious.org/vaapi/gstreamer-vaapi/ * FFmpeg/LibAV, another major multimedia framework on Linux: <http://git.videolan.org/?p=ffmpeg.git;a=summary> Depending on your usages and constraints, I suggest you to use higher level farmeworks as GStreamer or FFmpeg/LibAV to get this work done. The reason behind this is that it's not a matter of submitting the encoded elementary stream, you need additional work. So, in general, it's just simpler to use higher level frameworks, unless you have specific requirements. > And another question is its possible decode h264 stream and get back > decoded YUV data to host? A typical way for that is to use vaGetImage() on the decoded VA surface to copy the pixels back to host. You could also use vaDeriveImage() and a copy function that takes care of improving performance when downloading from Uncacheable Speculative Write Combining (USWC) memory. The best example for that is VLC: <http://git.videolan.org/?p=vlc.git;a=summary> (look for copy.[ch] files, vaapi.[ch] files). Regards, -- Gwenole Beauchesne Intel Corporation SAS / 2 rue de Paris, 92196 Meudon Cedex, France Registration Number (RCS): Nanterre B 302 456 199 _______________________________________________ Libva mailing list Libva@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libva
