iso2mkv is software for automated DVD to XviD/vorbis MKV video conversion. 
Gives almost total control on the process of video compression at maximum 
quality, while being simple and straightforward to use (a kind of 
'life-hack'). The intended audience is advanced end-users and the script is 
not user-error-proof.

Based on mplayer, mencoder, oggenc or lame, and mkvmerge (if not properly 
installed, won't work). This is only a shell script that wraps the other 
programs. If you can watch the DVD with MPlayer, you can compress it with 
iso2mkv. Other used programs (hopefully included in most GNU/Linux 
distributions as well a FreeBSD :) ) are basename, bc, nice, stat. 

WWW: http://5ko.free.fr/en/iso2mkv.html