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On 2011-12-16, Mark Knecht <markknecht@×××××.com> wrote: |
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> On Fri, Dec 16, 2011 at 11:03 AM, Grant Edwards><grant.b.edwards@×××××.com> wrote: |
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> |
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>> Correct. If you use dd to copy an encrypted disk, the result will be |
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>> missing something like 90% of the data. |
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>> |
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>>> I have no interest in tearing apart the DVD in any way. It was more |
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>>> about the idea of a fire causing the loss of maybe $15K-$20K |
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>>> investment over the years. I can rip all the CDs, keep the ripped |
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>>> version here to watch on the computer, and store the DVDs elsewhere, |
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>>> but that elimiates (generally) being able to watch special features |
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>>> which my wife and kid enjoy. |
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>> |
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>> No it doesn't. You can use dvdbackup (or k9copy or ...) to copy the |
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>> DVDs to the computer and when you play them back you get all the |
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>> menus and special features and whatnot. If you want you can create |
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>> ISO images and burn them to dual-layer-DVDs, but you don't need to do |
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>> that to play them with all the features. |
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|
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> So for my continued education, if I take an encrypted movie I can use |
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> program XYZ (Linux or Windows-based...) to create an iso image, but |
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> that iso image won't, even if it does include all the special |
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> features, ever be a bit-for-bit copy of the original. It's now |
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> unencrypted and created anew. |
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|
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Exactly. I used to use k9copy, but I got tired of fighting with Qt |
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dependancies and switched to dvdbackup. Sometimes I create ISOs and |
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burn them to DVDs, but usually I just create directory trees and watch |
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them via a SageTv set-top-box that mounts the directory via NFS. |
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|
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> It's a completely different way to represent the original data. |
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Yep. I'm not aware of any Linux software that can create an encrypted |
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DVD -- but I've never had a desire to do that, so my lack of knowlege |
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of such a thing shouldn't be used as an indication of non-existence of |
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such a thing. :) |
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|
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> That said, if it's a _complete_ representation of the original then |
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> the special features are there, and if written to a DVD _might_ work |
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> in my DVD player, |
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|
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They've always worked in the DVD players I've tried them in, including |
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subtitles, special features, multiple audio tracks, etc. The various |
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"backup" programs usually have options to pare down what's copied so |
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that you can do things like copy only the main title with one audio |
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track (with or without menus, subtitles, etc). Some of the backup |
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programs will also re-encode the video to make the end result fit |
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within a specified size -- for example you can generate a 4.7G ISO |
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image from a 9GB original. |
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|
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> assuming the DVD player isn't specifically looking for something that |
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> was on the original disc such as specifically encrypted blocks of |
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> data, etc. |
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> |
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> Am I getting closer? |
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|
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Indeed you are. |
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|
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-- |
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Grant Edwards grant.b.edwards Yow! How's it going in |
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at those MODULAR LOVE UNITS?? |
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gmail.com |