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View Poll Results: Which way to keep the backup?
ISO file with all protections kept 2 28.57%
ISO file with main protection removed 1 14.29%
ISO file with all protections removed 3 42.86%
File/Folder structure with all protections kept 0 0%
File/Folder structure with main protection removed 1 14.29%
File/Folder structure with all protections removed 0 0%
Voters: 7. You may not vote on this poll

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Old 17th July 2022, 23:42   #1  |  Link
Bahamuth
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Join Date: Dec 2003
Location: Germany
Posts: 78
Good way to keep disc backups as functional as possible?

Hi everyone,

let's say you have a DVD/BluRay, it's an old one, and you are afraid, it might not be able to be read anymore in the future, or that you will miss having a drive to read it at some point.
But you also might want to keep the original files, because in the future there might be better video compression formats or better ways to circumvent protections. And imagine you just have the space for doing so, like a NAS.

What would be the 'best' thing to do? So far my thoughts are:
1. make an ISO with all protections left intact, that is DVD/BluRay with CSS/AACS encrypted files
2. make an ISO but remove (only) the main protection, that is DVD/BluRay with removed CSS/AACS encryption
3. make an ISO but remove all kinds of protections, like structure protection, java protection, Region Code, BDPlus, UOPs, etc.
4. to 6. the same as 1. to 3. but not create an ISO file but create the folder structure (thus instead of having one ISO file you have the DVD/BluRay folder structure)

My personal problem with solution 2 or 3 is, that there are many tools out there to remove the protections, but... can I be sure, they do so correctly? Without altering the streams in a harmful way? In a way, that any program in the future can understand the de-protected files without errors? (I'm looking at MakeMKV which shows a warning if you decrypted files with something else before and that there could be errors (still an awesome program!))

What would you recommend?
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Old 19th July 2022, 15:59   #2  |  Link
Losko
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Join Date: Dec 2010
Posts: 65
My choice would be

7. no ISO file, but remove any kind of protections and copy only the main contents (main movie, the extras) in their untouched format (eventually muxed into .mkv)

I see no point in keeping menus, structures, java, playlists and ads/trailers/whatever
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Old 19th July 2022, 17:07   #3  |  Link
ChaosKing
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Join Date: Dec 2005
Location: Germany
Posts: 1,795
ISO + par2 recovery file is also an option (bit rot protection)
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