Man pages matching name dh_gstscancodecs in section 1:

dh_gstscancodecs.1.en	debian 10 / libgstreamer1.0-dev
dh_gstscancodecs.1.en	debian 11 / libgstreamer1.0-dev
dh_gstscancodecs.1.en	debian 12 / libgstreamer1.0-dev