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Blu Ray Folder Structure

Updated July 19, 2017

Blu-Ray discs use a simple file and folder structure that is easy to understand. All Blu-ray discs use identical file structures; the main directory on a Blu-ray disc is the BDMV directory.

BDMV

The BDMV directory is divided into several subdirectories. "Playlist" contains database files for video playlists, "Clipinf" stores database files for clips, "Stream" contains both audio and video files used for streaming, "Auxdata" contains sound and font files used in menus and "Backup" is home to two small files used for playback.

Audio and Video

The information used for video and audio on Blu-ray discs follows a special format called the BDAV MPEG-2 transport stream. Video and audio are handled differently on commercial BDMV (Blu-ray Disc Movie) discs than on the recordable Blu-ray discs sold for home computer use.

Fun Fact

Starting in 2011, Blu-ray discs are going 3D. The Blu-ray Disc Association has announced a new protocol for putting 3D video on discs, and Sony has announced that they are making new players for 3D Blu-ray. 3D Blu-ray discs will use the same folder structure as older Blu-Rays but will require a new player.

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About the Author

Ian Garfield has been writing professionally since 2005. His work appears in publications such as the "Philadelphia City Paper," "New York Nightlife," "Eat New York" and various websites. Garfield has a Bachelor of Arts in communications from Temple University.