MarsSeed [1] filed a deletion request for ffmpegthumbs-mattepaint [2]: Applet not updated since 2018, and since then it's been removed from hoster http://kde-look.org - seems it has been deprecated.
Not compatible with current KDE ffmpegthumbs: https://forum.manjaro.org/t/cannot-build-ffmpegthumbs- mattepaint/111917 I suggest to remove this package. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ffmpegthumbs-mattepaint/
