According to https://invent.kde.org/plasma/plasma-workspace/-/blob/master/shell/packageplugins/wallpaperimages/wallpaperpackage.cpp#L38 WebP is supported but that might be exclusive to Plasma 6.0.
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Plasma 6 Bugs
If you encounter a bug, proceed to https://bugs.kde.org/, check whether it has been reported.
If it hasn't, report it yourself.
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thanks
Go to cloudconvert.com and convert it to jpeg or png. Then it should work.
magick input.webp output.jpg
Doesn’t work for me, but this may also be an option.
Just make sure imagemagick is installed. convert input.webp output.jpg
will also work.
thanks, I used gimp to convert from .webp to .png. I guess the plasma desktop does not support .webp images as wallpapers then? It would be cool to support them in the future.
Check again in February after plasma 6 releases.
If it's anything like jxl there was a separate library to install for that. Might check there
Check if you have qt5-imageformats package installed. It is an optional dependency for kio-extras package that is not installed by default on Arch distros.
I am pretty sure webp works with the wallpaper picker on plasma5 from my experience.
cool, thank you very much