[Libav-user] Hardware Accelerated Decoding

Safi ud Din Khan safiuddinkhan at gmail.com
Sat Nov 30 19:53:01 CET 2013

ok thanks for the help

On 11/30/2013 11:05 PM, wm4 wrote:
> On Fri, 29 Nov 2013 17:04:56 +0500
> Safi ud Din Khan <safiuddinkhan at gmail.com> wrote:
>> Hello i am interested in doing hardware accelerated decoding for my
>> ffmpeg based multimedia program using VA API .... i am kind of a
>> beginner and does not understand very well as how VAAPI interacts with
>> ffmpeg libraries .... what i have seen from the source code of ffmpeg is
>> that some parts of VAAPI (decoding parts) are already implemented inside
>> ffmpeg source code (libavcodec/vaapi.c and others) ......
> It's complicated. ffmpeg.c now supports hardware decoding too (it's
> mostly an "example"), see:
>     http://git.videolan.org/?p=ffmpeg.git;a=blob;f=ffmpeg_vdpau.c
> For VAAPI is relatively similar, but the patches for ffmpeg.c vaapi
> support have not been merged yet, but see the series of patches
> starting here:
>     http://lists.libav.org/pipermail/libav-devel/2013-November/053307.html
> (Note that these just read the decoded video back to CPU RAM, which is
> of course inefficient and only serves as a way to somehow use the
> decoded data within the ffmpeg.c/avconv.c utilities.)
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