It seems MakeMKV falls back on KEYDB.cfg if it cannot extract the keys from the drive It can even emulate libaacs/libbdplus to enable VLC play discs without having to dump them first, but I haven't tried that. In practical terms, the easiest solution is to use commercial MakeMKV to create unencrypted disc image and play those. dll files from the discs, you'd need to reverse engineer that too. But note that this is extremely complex task as the code is heavily obfuscated, later BD+ versions talk with obfuscated Java code and even later BD+ generations simply force software players to load native. You must reverse engineer commercial Blu-Ray player and try to implement whatever is not implemented yet. If we knew what is missing then it would be implemented long time ago. But there is no TODO or any list of things missing. If you want to contribute to libdbplus, then do so.

You can easily extract VUK from DVDFab, using FindVUK tool from this forum. You can play all current Blu-Ray discs, that do not use BD+ (most of my discs, even new ones, don't have BD+ at all, but that depends what you buy), if you can find VUK for them.

Makemkv error scsi error hardware