tmn505 [1] filed a deletion request for ffmpeg3.4 [2]: All AUR packages which have depended on it, have moved on to newer versions or explicitly use 'ffmpeg-compat-57'. I, myself don't have any use for it also. Time to remove it. [1] https://aur.archlinux.org/account/tmn505/ [2] https://aur.archlinux.org/pkgbase/ffmpeg3.4/