The package kde-plasma/plasma-workspace-5.25.5:5::kde-kit come with the USE screencast as selected. This request media-video/pipewire to be installed.
USE="-X -gstreamer -ssl -v4l -zeroconf -bluetooth" emerge -1v These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild U ] media-video/pipewire-0.3.70::gnome-kit [0.3.67::gnome-kit] USE="-X* -bluetooth -doc -echo-cancel -examples -extra -gstreamer* -jack-client -jack-sdk -lv2 -pipewire-alsa -ssl* (-systemd) -test -v4l* -zeroconf*" 0 KiB
By trying to install media-video/pipewire-0.3.70, i got the following error in the build:
meson.build:1:0: ERROR: Meson version is 0.59.1 but project requires >= 0.61.1