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Hello
Could someone help me please? I got the 9 disc version of Hall of the Mountain Grill by Hawkwind recently which has 2 Bluray discs. I have successfully copied the first of these in readiness to be processed by DVD AE so that I can listen to the audio on my music streaming system. However the second disc; Hawkwind '1999' Party is coming up with the following error: 'The volume key is unknown for this disc - video can't be decrypted Backup failed'.

Any ideas

Hi, had the same problem with the live blue ray.
The solution is in the UHD discs section, public key database disc submission. There is a link to pkdb homepage where you can download a rar file. If you extract the file to the folder specified in the instructions you can back up this blue ray with makemkv. Not sure why the HOTMG blue ray works ok but the Cleveland disc needs this extra effort!