www.makemkv.com

I've been re-ripping some of my 4K's, and came across an odd error with "Edge Of Tomorrow".

I've been having all sorts of arseache recently (mostly with Warner stuff), but nothing that I haven't been able to overcome with a little perseverance.

Now I've been trying for over a day to open my copy of Edge of Tomorrow. This is something I've ripped before with no issue, but for some reason, I can't even open the disc any more as it fails on decrypt. It spits eventually spits out read errors, tells me it's possible the AACS certificate has been revoked, and then MakeMKV fatally exits.

Last resort, I copied all the files from the disc into a folder (which it did so with no errors, issues or slowdown) and I've tried opening this encrypted backup, but now I get a "cannot open, unknown key" error, along with a fresh TGZ file generated.

Will this key do any good? I copied the files using my LG drive, but I've been told several times before that Pioneer drives don't generate the keys properly. Because of this, I'm unsure how the fact that the key hasn't been generated by a drive at all would effect it.


Anyone else had weird disc opening issues like this?

Monkeylord wrote: ↑

Wed Aug 06, 2025 12:10 pm

Last resort, I copied all the files from the disc into a folder (which it did so with no errors, issues or slowdown) and I've tried opening this encrypted backup, but now I get a "cannot open, unknown key" error, along with a fresh TGZ file generated.

All UHD disks enable bus encryption, which means that your drive itself will encrypt the contents of your disk's BDMV/STREAM/ directory "on the fly" as you try to read it. This means that these files copied manually from your UHD disk to your hard disk will be encrypted twice. You would need to decrypt them using the correct RDK ("Read Device Key") before you could use the AACS decryption keys successfully.

Try using MakeMKV's "encrypted back-up" functionality to copy the files instead, as this will remove bus encryption to leave just regular AACS encryption. Alternatively, just open the disk using MakeMKV before copying the files manually, so that MakeMKV can enable LibreDrive.

I copied the files using my LG drive, but I've been told several times before that Pioneer drives don't generate the keys properly.

Pioneer drives can generate keys just fine. The only problem is that The Powers That KEYDB cannot read some of the metadata inside a TGZ dump file that was created using a Pioneer drive. This is why The Powers That KEYDB prefer receiving dump files created using LG/ASUS UHD drives.

I tried doing an encrypted backup, and it just gets stuck reading the same hash table file. Only difference is, instead of spitting out an dialogue box telling me that a fatal error occurred an and will shut down, it just simply closes.

It's a real headscratcher.


I get fed up and move onto a different disc in the pile, and 99 times out of 100 all goes fine. This is the only one that hasn't even opened for me. Usually a failure happens approx halfway through the rip, but a few retries and/or a disc wipe usually gets past it.

Monkeylord wrote: ↑

Wed Aug 06, 2025 3:17 pm

I tried doing an encrypted backup, and it just gets stuck reading the same hash table file. Only difference is, instead of spitting out an dialogue box telling me that a fatal error occurred an and will shut down, it just simply closes.

Once LibreDrive has been enabled (i.e. start MakeMKV, open the disk, close MakeMKV), your drive will no longer use bus encryption until you eject the disk. So what happens if you enable LibreDive and then copy the disk's files manually? The copy should only be AACS-encrypted.