Dolby® True-HD and Dolby® Atmos™ (MLP)
Dolby® True-HD and Atmos™ consist of two files: the True-HD stream (an mlp file) and the AC3 core (an ac3 file). Both files must have the same name and their respective extensions, for example "English.mlp" and "English.ac3".
Specify the mlp file in the movie/menu properties.
3D video (MVC)
3D video consists of two files: the main stream (usually the left eye) and the dependent stream (the second eye).
In Blu-Disc Studio both files must have the "mvc" extension. The dependent stream has to be specified in the "Dependent video" field of the Properties window.