From: Jan Stary <hans@stare.cz>
Subject: Re: Enable VA-API in graphics/ffmpeg
To: ports@openbsd.org
Cc: José Maldonado <josemald89@gmail.com>
Date: Mon, 29 Jul 2024 13:52:51 +0200

On Jul 21 18:00:28, lucas@sexy.is wrote:
> On Sun, Jul 21, 2024 at 01:09:24PM GMT, José Maldonado wrote:
> > This is rare. In my case, using mpv+yt-dlp for YouTube videos work
> > fine (using 4.4.4p3 and 4.4.4p5).
> 
> This isn't firefox tho, which is were I do experience issues. My
> ffmpeg+mpv works fine, even mpv+yt-dlp with your YouTube video.

To be clear: what do you mean by ffmpeg+mpv, as opposed to mpv+ytdlp?
mpv uses ffmpeg's libavcodec (right?) for software decoding;
does mpv also use some parts of ffmpeg when hw decoding via vaapi?

If not, then ffmpeg does not enter into it, right?
If yes, then it would be the same for mpv+ytdlp (right?),
as yt-dlp is just a downloader.

Sorry if I'm missing something obvious.

> >  mpv https://www.youtube.com/watch\?v\=PXFXEGLi3wg
> >  (+) Video --vid=1 (*) (vp9 1920x1080 59.940fps)
> >  (+) Audio --aid=1 --alang=eng (*) (aac 2ch 44100Hz)
> >      Subs  --sid=1 --slang=live_chat 'json' (null) (external)
> > File tags:
> >  Uploader: Edu Camps
> >  Channel_URL: https://www.youtube.com/channel/UCV6dTKLL29jPIggEvjIMPzw
> > [ffmpeg/video] vp9: No support for codec vp9 profile 0.
> > AO: [sndio] 44100Hz stereo 2ch s16
> > VO: [gpu] 1920x1080 yuv420p
> 
> I don't believe you're doing hardware decoding here. This is how it
> looks in my machine:
> 
>  (+) Video --vid=1 (*) (vp9 3840x2160 59.940fps)
>  (+) Audio --aid=1 --alang=eng (*) (aac 2ch 44100Hz)
>      Subs  --sid=1 --slang=live_chat 'json' (null) (external)
> File tags:
>  Uploader: Edu Camps
>  Channel_URL: https://www.youtube.com/channel/UCV6dTKLL29jPIggEvjIMPzw
> Using hardware decoding (vaapi).
> AO: [sndio] 44100Hz stereo 2ch s16
> VO: [gpu] 3840x2160 vaapi[nv12]
> 
> You need both --hwdec=auto in mpv and one of graphics/intel-media-driver
> or graphics/intel-vaapi-driver for Intel cards, depending on your
> graphics card. idk what the requirements are for AMD cards.

There is a difference I see between usimg mpv-0.38.0,
which didn't use vaapi (right?) and mpv-0.38.0p0, which does.
(My i965 doesn't do vp9, using h264.)

$ mpv /media/Brabec/kytice.mkv
 (+) Video --vid=1 (*) (h264 1920x1080 23.999fps)
 (+) Audio --aid=1 --alang=cze (*) (ac3 6ch 48000Hz)
Using hardware decoding (vaapi-copy).
AO: [sndio] 48000Hz 5.1(alsa) (5.1) 6ch s16
VO: [gpu] 1920x1080 nv12
AV:l00:00:00:/001:23:43:(0%)3A-V:)-0.0180ct:0-0.0650m?25h
Exiting... (Quit)

$ mpv /media/Brabec/kytice.mkv
 (+) Video --vid=1 (*) (h264 1920x1080 23.999fps)
 (+) Audio --aid=1 --alang=cze (*) (ac3 6ch 48000Hz)
Using hardware decoding (vaapi).
AO: [sndio] 48000Hz 5.1(alsa) (5.1) 6ch s16
VO: [gpu] 1920x1080 vaapi[nv12]
AV:l00:00:02:/001:23:43:(0%)3A-V:)-0.0010ct:0-0.0820m?25h
Exiting... (Quit)

What does the "vaapi-copy" stand for?
It seems the old mpv-0.38.0 (i.e. not -p0)
was using some kinf of vaapi already;
does mpv carry its own copy?

	Jan