Place the downloaded KEYDB.cfg into that data directory. Even if the downloaded file is named keydb.cfg (lowercase), rename it to KEYDB.cfg . The capitalisation is critical – MakeMKV will not recognise a lowercase version.
KEYDB.cfg is a plain text configuration file used by media software (like MakeMKV, VLC, and various ripping tools) to store for AACS-protected discs.
KEYDB.cfg is a plain‑text file that stores cryptographic keys needed to decrypt AACS‑protected Blu‑ray content. The format originated from the DumpHD project and was later adopted by , the open‑source library that VLC and other media players use for Blu‑ray playback. keydbcfg makemkv
According to documentation on ibiblio.org , the standard location for this file is: ~/.config/aacs/KEYDB.cfg For Windows Users:
For users who frequently rip discs, manually downloading and copying files can be tedious. Fortunately, there are tools designed to automate the process. Place the downloaded KEYDB
Insert your protected disc, open it in MakeMKV, and the software will now use the keys in your KEYDB.cfg file to bypass the protection. Troubleshooting KEYDB.cfg Issues
Whether you are a seasoned expert or a first-time user, understanding this community-driven resource is essential for any serious home media archivist. By using this guide, you are now equipped to handle that "unknown volume key" error and get back to building your digital library. According to documentation on ibiblio
Ensure the file is inside the data directory specified in MakeMKV's preferences ( Preferences > General > MakeMKV data directory ), rather than the installation folder in Program Files .
The primary source for this file is at: http://fvonline-db.bplaced.net . You will typically download a .zip archive; inside you will find the KEYDB.cfg file.
Assumption: you’re using a desktop OS with MakeMKV already installed.
Ensure it is KEYDB.cfg , not KEYDB.cfg.txt .