[ Thanks to MikeFM for this link.
]
“Most of us own at least a few DVD movies. The DVD has all but
replaced the once popular VHS format. Unfortunately DVDs are not
very durable. You may find yourself wanting to create backups of
your DVD movies. This can be useful to increase the life of your
movies as well as for additional purposes such as removing region
locking or converting from PAL to NTSC. Since dual-layer discs are
still quite costly, most of us choose to use the older 4.7GB discs
which are much more affordable. Many DVD movies are larger than
4.7GB so that we can’t make a direct copy of the DVD image from the
original to our copy. For this reason we’ll need to shrink the
original video to fit. This process is easy to do.“To begin you’ll need a computer running Linux and you’ll need
several programs installed…”