Re: [gentoo-user] Re: DVD Movie backups

[Mark Knecht]

On Fri, Dec 16, 2011 at 11:03 AM, Grant Edwards
<grant.b.edwards@×××××.com> wrote:
> On 2011-12-16, Mark Knecht <markknecht@×××××.com> wrote:
>> On Fri, Dec 16, 2011 at 9:06 AM, Michael Mol <mikemol@×××××.com> wrote:
>
>>> No; you'll have to decrypt, or do without the encrypted bits.
>>>
>>> dvdbackup is probably the closest to what you want.
>>
>> Interesting. So even something that just copies blocks of data, like
>> dd, can't be used for that purpose?
>
> Correct.  If you use dd to copy an encrypted disk, the result will be
> missing something like 90% of the data.
>
>> I have no interest in tearing apart the DVD in any way. It was more
>> about the idea of a fire causing the loss of maybe $15K-$20K
>> investment over the years. I can rip all the CDs, keep the ripped
>> version here to watch on the computer, and store the DVDs elsewhere,
>> but that elimiates (generally) being able to watch special features
>> which my wife and kid enjoy.
>
> No it doesn't.  You can use dvdbackup (or k9copy or ...) to copy the
> DVDs to the computer and when you play them back you get all the menus
> and special features and whatnot.  If you want you can create ISO
> images and burn them to dual-layer-DVDs, but you don't need to do that
> to play them with all the features.
>
> --
> Grant Edwards               grant.b.edwards        Yow! Now we can become

Hi Grant,
   I should have guessed you'd be on top of this subject given your
pointer a month ago about Handbrake. (Which has been a really great
program.) Thanks for that and thanks for the additional info.

   So for my continued education, if I take an encrypted movie I can
use program XYZ (Linux or Windows-based...) to create an iso image,
but that iso image won't, even if it does include all the special
features, ever be a bit-for-bit copy of the original. It's now
unencrypted and created anew. It's a completely different way to
represent the original data.

   That said, if it's a _complete_ representation of the original then
the special features are there, and if written to a DVD _might_ work
in my DVD player, assuming the DVD player isn't specifically looking
for something that was on the original disc such as specifically
encrypted blocks of data, etc.

   Am I getting closer?

Thanks,
Mark