rip a dvd to avi (xvid)

mencoder dvd://1 -dvd-device /media/cdrom0 -ovc xvid -xvidencopts pass=1 -alang en -oac copy -o /dev/null
mencoder dvd://1 -dvd-device /media/cdrom0 -ovc xvid -xvidencopts pass=2:bitrate=1000 -alang en -oac mp3lame -lameopts vbr=3 -o rip.avi