El mié, 24 jul 2024 a la(s) 2:01 a.m., Rafael Sadowski
(rafael@sizeofvoid.org) escribió:
>
> On Sun Jul 21, 2024 at 04:58:15PM GMT, Lucas Gabriel Vuotto wrote:
> > On Sat, Jul 20, 2024 at 11:32:29AM GMT, Rafael Sadowski wrote:
> > > OK to enable VA-API? It only depends on xenocara libva. Since libva
> > > builds on almost all arches, I see no reason to restrict it by CPU
> > > architectures any further.
> >
> > This worked well with mpv but is giving me issues in Firefox:
>
> I can confirm that it works well with mpv(1) but not in ff. In my last
> test I only tested WebGL and simple youtube stuff.

Let me tell my story...I have ffmpeg and mpv with the VAAPI patch
active, and I use mpv constantly for videos (even with GLSL shaders
and using Vulkan's video output).

So far no problems on an old AMD RX 580.

First, I was able to solve my problem with acceleration in Firefox
using this about:config option

media.ffmpeg.vaapi.enabled = true

Once I enabled it, in about:support I saw h264 hardware decoding
support (but not h265 and my card is capable). VP8 and VP9 support is
something my old RX 580 doesn't have, so I can't test the 4k video you
posted.

>
> I have not noticed taht playing youtube run on my CPU. That's because up
> to 1080p60 always runs smoothly. But 2160p60 is the end of the line
> here.
>
> What I cannot confirm, any disadvantages with enabling or disabling
> VAAPI.
>

Using HWaccel in Firefox (in my case only work with h264) the CPU
usage drop a 10% aprox in 1080p60. Nice!

> >
> > - Invidious instances (YouTube alternative frontend) give me "No
> >   compatible source was found for this media"
> > - Twitch gives a similar message
> > - Couldn't test in YouTube because it thinks I'm a bot
>
> WTF!
>
> > - Some meme pages show webms just fine
>
> I don't see it, I'll test it with a new profile. Can you give me a test
> example?
>
> >
> > In any case, disabling hardware media decoding didn't help. Rolling back
> > to 4.4.4p3 (that's what's in cdn.openbsd.org) makes the issues go away.
> > I can try with 4.4.4p4 too (adds --disable-vaapi), if it's needed.
> >
> >       Lucas
> >
>
> Can AMD users play https://www.youtube.com/watch?v=LXb3EKWsInQ in
> 2160p60 on FF without blowing the CPU?
>
> If so, it is only an Intel problem
>

This video in 2160p60 use VP9 codec, in my case I don´t have hwaccel
for this codec but testing the CPU goes to 40-45% use.

In any case, my best experience is with ffmpeg+mpv, in this case VAAPI
works perfectly even with my custom mpv configuration which is quite
demanding (several GLSL including one that simulates FSR, I have
tested it with resolutions up to 2160p60 in h264 and h265, and no
problems with acceleration).


-- 
"Dios en su Cielo, todo bien en la Tierra"
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