AMD "EFC" Support Added To Mesa 22.1 For Radeon GPUs With VCN 2.0

[brad0]

Speaking of hardware video acceleration on Radeon, can AMD devs take a look at Firefox, because version 98 just broke video acceleration just for AMD hardware, and it doesn't looks like it will come back anytime soon.

https://bugzilla.mozilla.org/show_bug.cgi?id=1758613

It's definitely not just for AMD hardware.

[MadeUpName]

I wonder if this will help with AV1 re-encodess.

Hardware-encoded 4:4:4 is pretty niche TBH.

In fact, what is the use case?

Rendering intermediaries at non glacial speeds.

[smitty3268]

you better put 4:4:4 and improve the encoding quality on future encoding blocks or else...

Or else what?

[zboszor]

Or else what?

"It's a sort of threat, you see. I've never been terribly good at them myself but I'm told they can be terribly effective."

[tildearrow]

Or else what?

Or else I may end up buying Intel (if they do make graphics cards) or even NVIDIA.
Sadly:

AMD: fast and open-source but less features and stability depends on the outcome of a slot machine
Intel: open-source, featureful and stable, but weak and power-inefficient (currently)
NVIDIA: stable and featureful, but KWin stutters more on NVIDIA and the drivers are closed-source

[theriddick]

NVIDIA: stable and featureful, but KWin stutters more on NVIDIA and the drivers are closed-source

I've just been using picom with experimental backend instead of Kwin. I kind of need unredirection for some games which Kwin can't do. But just saying there is alternatives.

(using 6800XT atm, uncertain if I will go 4080 or 7800 next release, I like open-source but amd feature level is many years behind in certain areas like this and RT)

[brucethemoose]

for one I would consider it necessary for VDI/remote desktop application. and as for game stresming many MMOs benefit from 4:4:4 too.

Oh yeah... that could be quite a benefit over LAN or some crazy fast WAN.

Other than that though? Seems like you're basically always better off doubling with that extra bitrate for each plane.

Rendering intermediaries at non glacial speeds.

Yeah... but you can just use lossless x264 or ffv1 for that? They are quite fast.

Unfortunately, lossless HEVC and (afaik) AV1 kinda suck.

[Quackdoc]

Oh yeah... that could be quite a benefit over LAN or some crazy fast WAN.

Other than that though? Seems like you're basically always better off doubling with that extra bitrate for each plane.

Nah, modern encoders are competent enough that it isn't an issue. AV1 can handle 4:4:4 at really good quality with around 20mbit using mostly default settings, I didn't test svt-av1 since it doesn't support 444 yet.

[tildearrow]

Yeah... but you can just use lossless x264 or ffv1 for that? They are quite fast.

Not as much when compared to a hardware encoder.
Furthermore, those "intermediaries" don't have to be fully lossless...

[brucethemoose]

Not as much when compared to a hardware encoder.
Furthermore, those "intermediaries" don't have to be fully lossless...

Yeah that is fair, I guess I'm making too many assumptions based on my own experience (where the intermediaries are lossless or super-high bitrate, and usually not stored for long, and not bottlenecked by x264/PCIe speeds).