How to create key file?

[glass_table]

I have a folder that contains a copy of an encrypted blu-ray disc. There is an AACS folder that contains a MKB_RO.inf file and a Unit_Key_RO.inf file. Can I use these to create a keyfile so that the disc can be unencrypted?

[glass_table]

Never mind. The folder actually contained an unencrypted disc, but there was an AACS folder, so MakeMKV kept trying to decrypt it. I took out the AACS folder, and everything worked fine.