Man pages matching name oggdec in section 1:

oggdec.1.de	debian 10 / manpages-de
oggdec.1.en	debian 10 / vorbis-tools
oggdec.1.de	debian 11 / manpages-de
oggdec.1.en	debian 11 / vorbis-tools
oggdec.1.de	debian 12 / manpages-de
oggdec.1.en	debian 12 / vorbis-tools