[Cin] Still on hardware acceleration

[Andrew Randrianasulu]

On Tue, Sep 5, 2023 at 11:36 AM Andrew Randrianasulu
<randrianasulu at gmail.com> wrote:
>
> On Tue, Sep 5, 2023 at 10:59 AM Andrea paz via Cin
> <cin at lists.cinelerra-gg.org> wrote:
> >
> > @Andrew
> > Sorry to bother you again on a subject you have already tried to
> > explain over and over again.
> >
> > Reading this page:
> > https://trac.ffmpeg.org/wiki/HWAccelIntro
> > it is my understanding that when decoding (note: from here on I am
> > only referring to decoding/playback!) you can use the "-hwaccel"
> > option without any other settings.
>
> As far as I understand those options parsed in ffmpeg command line
> tool itself, so using library from c/c++ requires some  similar manual
> work ....
>
>
>  If the media file used supports
> > hardware acceleration, then it will be used automatically without
> > anything else to do. If it is not supported it will automatically
> > switch to software decoding. There is no need to specify the device
> > (because a device is automatically selected, even if it is not the
> > preferred one), so it would be a generic feature that decides for
> > itself when to run.
> > Question, how can I impose "-hwaccel" when compiling CinGG?
> >
> > Another thing concerns decoding with Vulkan. Again, these are generic
> > instructions and I would like to test it, however it requires device
> > initialization, to be declared explicitly (although a generic term is
> > fine: "vulkan=vk:0") and a few other options. See here:
> > https://trac.ffmpeg.org/wiki/HWAccelIntro#Vulkan
> > The question is always the same: How can I compile vulkan in CinGG to
> > do some tests?
>
> There is possibility that current ffmpeg.git broken with latest
> released vulkan headers, see ffpeg-user list..
>
> In 5.1/6.0 you will get in best case just some  filters, _may be_ amd
> specific (and not open source?) encoder.
> Vulkan work in future 6.1 aims just more unified (win/mac/lin may be
> android) video interface ... instead of libva/ dxva11 /  videotoolbox
> on each platform, as far as I understand.


AMF  stuff:

https://github.com/GPUOpen-LibrariesAndSDKs/AMF/issues/348



>
> https://github.com/mpv-player/mpv/issues/11739
>
> http://ffmpeg.org/pipermail/ffmpeg-user/2023-September/056774.html
>
> May be there will be some benefits  in driving hw blocks  this way,
> not sure (there was  talk mesa's va encoder implementation not most
> speedy one)
>
> But to your question just go to thirdparty/makefile and look for long
> ffmpeg command line (without-ffplay etc), just remove --disable-vulkan
> from there
> .
>
> Or try to compile cingg without thirdparty ffmpeg.
>
>
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