Created attachment 1743722 [details]
Description of problem: videos look pixelated and/or over sharpened when hw acceleration is enabled.
I've provided you with an "example" picture of what it looks like with hw acceleration enabled (left) and disabled (right).
Version-Release number of selected component (if applicable):
How reproducible: always.
Steps to Reproduce:
1. enable hw acceleration.
2. play a video.
Actual results: videos look "pixelated", or over sharpened with hw enabled.
Expected results: flawless video w/wo hw acceleration.
This is the closest thing I've found, while searching for an answer online, though most likely not related:
x86_64, PRIME Z270-A, i5-7600K, 16GB DDR4, AMD RX 580 8GB (MESA 20.3.2) & 970 EVO M.2.
As it turns out, it was a problem with VA-API, but disabling HW rendering or using VDPAU solved it, though I'm not sure what to make of it.
Mesa <20.3 had a bug (https://gitlab.freedesktop.org/mesa/mesa/-/issues/1193) that caused VA-API not to work at all in VLC when using the AMD driver.
For what it's worth, I can't repro this, though my environment is somewhat different:
Hardware: RX 5500 XT
- KDE 5.20.4/Qt 5.15.2
Re: VDPAU - I was under the impression that that was tied to X11 and didn't work under Wayland - can you confirm that it's working in VLC and not falling back to software rendering?
Thanks for pointing that out, it looks to be falling back to software and I noticed the same behaviour when selecting VA-API (drm).