copying video dvds

[Greg Woodbury]

On 08/06/2013 08:31 PM, g wrote:
>  
> iirc, sometime back something being mentioned that if you 'dd'
> /dev/dvd to a file and name it *.iso, you can then mount the iso
> file in 'loop0' and see the contents of the dvd.
> 
> i can not say if this is true, as i have not tried such with either
> an install, data, audio, or video dvd.
> 

DVD and BlueRay disks are inherently "digital data" devices with
the contents contained in files that are named according to strict
standards.  (This is very unlike audio CDs.)

There are a huge variety of wasy that manufacturers of DVD/BR discs
use to try and prevent "unauthorized" copying of their products.  The
most common is the dvdcss encryption of file contents.  Some try
encrypting even the file names, and several use intentional errors in
unused files or parts of discs.

dd-rescue is just one of many alternative commands to allow copying of
such discs.

HTH
-- 
G.Wolfe Woodbury