I can confirm that
dvdbackup with the
-M flag does the same exact thing as
vobcopy: It creates a DVD directory structure on harddrive, decrypts files from DVD, copies the decrypted DVD files to harddrive.
dvdbackup does not come with a man page, but usage information can be found here:
https://wiki.archlinux.org/index.php...#The_whole_DVD