I just updated MakeMKV to the latest and greatest version (1.10.10) in preparation for my first 4K UHD ripping attempt. I have one of the external drives that "supposedly" supports it (LG BE16NU50)?
I struck out on both of my first two attempts (Interstellar and Sing). MakeMKV was able to "load" both discs, and reported that they were 4K UHD and AACS v.61, etc, but when I tried to open them both failed.
"The volume key is unknown for this disc - video can't be decrypted
Failed to open disc"
I have a few more discs I can try (Despicable Me 3, Logan, Planet Earth II, etc). I'll report back if I have any luck with any of the others...
Living Room: Sony x940E; Denon x4400h w/ Marantz MM7055; Ascend Sierra RAAL Tower L/R's and 2EX center, Polk Monitor 35B Rears, Rythmik F25 sub. NVidia Shield, ATV4k, OPPO UDP-203, CCA.
Basement: Samsung PN58B650 & LN-T4065F (x2); Onkyo TX-NR809; Kplisch RP-600m L/R's, SVS PB-1000 sub. NVidia Shield (x2), Windows Desktop, CCA, Pi running Ropieee.