Virtual package gstreamer1.0-videosource is provided by:
dpkg-query: no packages found matching gstreamer1.0-qt5 Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend ||/ Name Version Architecture +++-===============================-================-==================================== ii gstreamer1.0-gl:amd64 1.22.0-3+deb12u1 amd64 GStreamer plugins for GL ii gstreamer1.0-plugins-bad:amd64 1.22.0-4+deb12u5 amd64 GStreamer plugins from the "bad" set ii gstreamer1.0-plugins-base:amd64 1.22.0-3+deb12u1 amd64 GStreamer plugins from the "base" set ii gstreamer1.0-plugins-base:i386 1.22.0-3+deb12u1 i386 GStreamer plugins from the "base" set ii gstreamer1.0-plugins-good:amd64 1.22.0-5+deb12u1 amd64 GStreamer plugins from the "good" set ii gstreamer1.0-plugins-good:i386 1.22.0-5+deb12u1 i386 GStreamer plugins from the "good" set 6 packages