@Apfelkuacha You'll need to report this upstream - maybe "vote" by adding thumbs up for https://github.com/UltraStar-Deluxe/USDX/issues/538
Edit:
Also compiling https://aur.archlinux.org/packages/ultrastardxwp-git/ works for me at this moment so you may want to try this until the problem with libavutil
is fixed.
Pinned Comments
jose1711 commented on 2021-06-16 07:06 (UTC)
Please see https://github.com/UltraStar-Deluxe/USDX/issues/538 for updates (patch needs testers so make sure you share your results)