DVD navigation

[Samuel Hocevar]

On Mon, Aug 13, 2001, Rob Cavicchio wrote:

> > It should work (if it doesn't, then only minor modifications would be 
> > required) but only if the DVD from which the image was made 
> > was unencrypted.
> 
> Oh, for some reason, I thought vlc had CSS decryption built in.  (So far
> I've only tried it with unencrypted files.)

   It has, but in order to decrypt CSS-encoded data, vlc needs a
decryption key, and the process of generating the decryption key
includes retrieving data from hidden parts of the DVD (through what is
called DVD ioctls), which can't be done when the data has been copied to
the hard disk.

-- 
Sam.