Some discs protected by BD+ use a complex Java code during BD+ handshake. If Java runtime is missing, the disc will be opened, but many fake titles will be present. The Java program on the disc selects a correct playlist, and MakeMKV needs Java runtime in order to run the program on the disc. Instead of a single movie the disc contains dozens of copies of the movie with scenes present in random order.

Some discs employ a so-called Fake Playlists protection. It is also possible to specify Java path manually in MakeMKV preferences - this way you can avoid system-wide JRE install, or force MakeMKV to use a specific JRE version.īelow is a short list of cases when MakeMKV needs Java runtime: Fake playlist protection If you don't have JRE installed, then you will have to install one in order for MakeMKV to use it. If you already have Java installed then you don't have to do anything - MakeMKV will automatically find and use the best available version. MakeMKV can use any version of Java and usually can locate ne, if it is already installed. In some cases MakeMKV requires a Java Runtime Environment (JRE) in order to process the disc. Java application on a blu-ray disc serves multiple purposes - draws disc menus, selects playlists for playback, and sometimes is used as part of content protection. Every blu-ray player contains a Java Virtual Machine that runs BD-Java application (usually) present on a blu-ray disc.

BD-Java is a technology used on most blu-ray discs.

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