www.makemkv.com

The volume id is embedded in one of the files that makemkv creates when creating a dump or disc backup. It needs to be parsed from that file. The file is not text.

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I have created a tool that can extract the VID and calculate the correct MK and VUK from the backup created by makemkv. If you share this backup I can give you the VUK. I don't need the whole backup. I only need the discatt.dat file and the AACS directory.

dedykjp wrote: Mon Apr 14, 2025 4:39 am I have created a tool that can extract the VID and calculate the correct MK and VUK from the backup created by makemkv. If you share this backup I can give you the VUK. I don't need the whole backup. I only need the discatt.dat file and the AACS directory.

AFAIK your tool would need an unrevoked AACSv2 device key in order to calculate the MK for a UHD disk. The only publicly known device keys are for AACSv1, i.e. standard non-UHD BluRays.

You should also be aware that MakeMKV obfuscates the VID inside its discatt.dat file, for certain drive models.

MrPenguin wrote: Mon Apr 14, 2025 12:22 pm AFAIK your tool would need an unrevoked AACSv2 device key in order to calculate the MK for a UHD disk. The only publicly known device keys are for AACSv1, i.e. standard non-UHD BluRays.

I know about it. My tool is based on libaacs and needs valid non-revoked device keys or processing keys. Because keys for UHD are not publicity known so I can calculate VUK only for standard Blu ray disc.

MrPenguin wrote: Mon Apr 14, 2025 12:22 pm You should also be aware that MakeMKV obfuscates the VID inside its discatt.dat file, for certain drive models.

I didn't know about it. My drive doesn't do that and I always get a valid VUKs, but for certain drive models it may not always be true. Thank for inform me about it.

dedykjp wrote: Mon Apr 14, 2025 1:02 pm My tool is based on libaacs and needs valid non-revoked device keys or processing keys. Because keys for UHD are not publicity known so I can calculate VUK only for standard Blu ray disc.

Yes, that's what I suspected . However, most of the TGZ dump files shared here will be for UHD disks because MakeMKV can also do what your tool can do for standard Blurays. There's just a small pause right now for those disks using MKBv82...

But, if a disc works on a HW player PS5, but any try to get it on a PC with dvdfab/makemkv/etc give a missing key "The disc key is not found" "update soft" etc.
I tried to wrote a msg to makemkv email, but nothing happened.
*i have a makemkv *.tgz file
How can i get it?