I'm currently in the process of trying to output an avi (xvid) using mencoder, but by using a mounted iso and not a physical dvd.
I know that mplayer can play a mounted iso image, but I have achieved this using the GUI via preferences>misc then changing the DVD device path, but I'm stuck when it comes to playing the iso from the command line. Once I have worked out how to play the iso, I can start on encoding.
Hoping this is a simple one!
The path to the .iso is /mnt/disk