Upscaling is blocky/missing AA

[Arp]

Hello,

I'm not sure how to describe it.
Here is a screenshot.
Ever sine I got the new AMD 6900XT I have the feeling that there is Antialiasing missing, or something.
Even in VLC.
I attached a screenshot.
You can see at her shoulders that it's quite "blocky". Granted, this is upscaled from DVD to 1440p within VLC, but I would have assumed it could do better than that.
https://imgur.com/a/2yHzFjV
I tried several modes in the upscaling filter page of the advanced options. Nothing seemed to changed.
So, could this be an issue with VLC, or AMD, or is it just not possible to get it better?
Thanks!

[Rémi Denis-Courmont]

The upscaling filter? Normally, VLC lets OpenGL (or the display server) take care of upscaling in the GPU.

[Arp]

Then there might be a bug in opengl? Or the radeon driver sucks? Because it looks much better if I set the video from Automatic or Opengl to XCB...

Here is more or less the same frame with X11 XCB instead of opengl.
https://imgur.com/a/QQctEma

[Rémi Denis-Courmont]

In principles, it could be either, but it's somewhat unlikely that the OpenGL output would have such an obvious bug unnoticed until now.

[Arp]

Hey,

I just wanted to say that this is still present in Linux Mint 21 and vlc 3.0.16.

I tried it with the built in player called celluloid and this does not seem to have this upscaling issue. But I don't know if it uses opengl or not.

[Arp]

I just played around with more settings and the scaling is fine when I go into all settings, then to opengl and change the opengl extension to GLX and change the OpenGL/GLES hardware converter from automatic to "VA-API OpenGL surface converter for X11"

I have no idea what those things mean, I was just playing around, but this seems to fix the issue.

[Rémi Denis-Courmont]

Sounds like your GPU drivers are seriously broken.

[Arp]

It's a fresh installation with 5.15 kernel.I kept reading that all necessary amd drivers are already in the kernel, so I did not install any external drivers.

[rom1v]

> Granted, this is upscaled from DVD to 1440p within VLC

Bilinear upscaling (like applied by OpenGL) has poor quality for such a big upscaling.

On VLC 4 development branch, you can enable some better upscaling filters (at the cost of performance): https://code.videolan.org/videolan/vlc/ ... quests/905