However I've just read this...
https://forum.videohelp.com/threads/312866-What-the-hell-is-Warner-doing-to-their-Archive-DVDRs#post1938136 wrote: these kind of "burn on demand" disks use CSS-MR (Content Scramble System - Managed Recording), which is a completely different specification than the one for CSS. Consequently, special burners, special dvd-r disks, and special burning software are required.
Only "DVD Download" certified drives can read them, due to the differences between the two standards. If you have a certified drive, it should work. If your drive isn't certified for CSS-MR, you're likely to have problems.
So I'm curious to know if anyone has successfully ripped such discs and if MakeMKV is even compatible with them (assuming my drives are - some users in the thread saying their drives will read them).
Thanks