How do I pass volume key to MakeMKV?
MakeMKV can process an incomplete blu-ray disc backup as long as volume key is known for that disc. Incomplete backup is an encrypted backup without a volume id part, the most common case being ISO image from PS3 system or files plainly copied from blu-ray disc. In order to open such disc a disc-specific key must be supplied to MakeMKV via text file in AACS key directory. First, you need to set an "AACS keys directory" in preferences; then you need to put a keyfile with disc for your key into this directory. MakeMKV will scan all files in this directory and will accept key in any format. Group of volunteers maintains a decent key database at http://forum.doom9.org/showthread.php?t=120988 . Be sure to download the latest keydb_bd file and unpack it into your AACS keys directory.