Well, if you have some DVDs that you will like to backup, here are the steps to do it.
Note: For non-encrypted DVDs, meaning like personal home videos, non-commerical created DVDs, etc.. 🙂
dvdbackup -M -i /dev/dvd -o ./outputdir/
-M tells it to make a full backup, there are other parameters to backup selective chapters.
dvdbackup will create the DVD folder structure under ./outputdir/<volume-name>
mkisofs -dvd-video -o dvd.iso ./outputdir/<volume-name>