 The only file system developed for BDMV is the "System Description Blu-ray Read-Only Disc Format part 2 File System Specifications version 1.0" (UDF) which defines the requirements for UDF 2.50.All BDMV application files are stored under a "BDMV" directory.Audio, video, and other streams are multiplexed and stored on Blu-ray Discs in a container format based on the MPEG transport stream.