Man pages matching name gst-discoverer-1.0 in section 1:

gst-discoverer-1.0.1.en	debian 10 / gstreamer1.0-plugins-base-apps
gst-discoverer-1.0.1.en	debian 11 / gstreamer1.0-plugins-base-apps
gst-discoverer-1.0.1.en	debian 12 / gstreamer1.0-plugins-base-apps