The MKV container (version 1) did not support Profile 7 FEL properly. When you remux a disc to MKV, you often lose the "FEL" part of Dolby Vision. You either:
Source: Feng, Y., Li, Z., & Zhang, Y. (2020). A Study on 4K Blu-ray Remuxing: Quality and Efficiency. IEEE Transactions on Consumer Electronics, 66(2), 146-155. bluray remux 4k
: A single 4K remux typically ranges from 50 GB to 100 GB . The MKV container (version 1) did not support
That weekend, Leo built his first “remux server.” A simple PC with a large hard drive. He ripped his own 4K discs (always legally, he reminded himself). 2001: A Space Odyssey —88 GB. The Revenant —91 GB. Interstellar —84 GB. bluray remux 4k