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I haven't looked into it, but doesn blu ray need some kind of connectivity to manage its cryptography?
The encryption keys are stored on the disk I believe. I use MakeMKV and load the files into my media center software (Jellyfin). That works for DVDs, Blu-rays and 4K disks just fine. Every once in a while if I get a 4K early, the keys haven’t been updated yet and I have to give it a day (usually less) before it rips.