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The keydb.cfg file is a public database used to store decryption keys (specifically —Volume Unique Keys) for Blu-ray and UHD discs. While MakeMKV primarily uses its own internal system of "hashed keys" that it downloads automatically, users often use a keydb.cfg file as an optional workaround to decrypt newer discs that aren't yet supported natively. Key Usage Details
: The "Data Directory" found in MakeMKV preferences. keydb.cfg makemkv
If you have ever tried to rip a 4K UHD Blu-ray using MakeMKV only to be met with a "Volume Key is Unknown" error, you have encountered the primary hurdle of modern physical media backup. To bypass this, the software requires specific decryption keys. This is where the file becomes your most important tool. What is keydb.cfg ? The keydb