Everything that can be utilized by transcode should be installed first. OpenDivX is a free implementation of the mpeg4-codec. Alas, the developers at ProjectMayo didn't gratefully release their actual source in compileable versions, so the displeasure of the users majority canalized into a new project named Xvid. Xvid development was interrupted in Autumn 2002 due to a code-theft the developers at Sigma design committed but it is continued now. For worse luck, OpenDivX and Xvid are using the same header file names (an issue that wouldn't be resolved easily) and function namespace, so you'll have to choose which one to use in transcode. I personally vote for Xvid, because the installation from sources is much smoother. If you use mencoder and transcode at the same time, you may want to choose different codecs for each. Install transcode by running the following commands: ./configure --prefix=/usr --with-ogg --with-vorbis\ --with-libfame --with-lame --with-avifile \ --with-libpostproc-builddir=../MPlayer-<version> && make && make install Replace <version> with whichever MPlayer Version number is appropriate.