Movie Object

Type of format	Data format and Object file
First released	2006
Developer	Blu-ray Disc Association
Filename extension	MovieObject.bdmv
Limits	1,001 Objects allowed
Open Format?	Yes
Free Format?	?
Magic Number	MOBJ0100MOBJ0200 (BD) MOBJ0300 (UHD-BD)

BD-J Object

Type of format	Data format
First released	2006
Developer	Blu-ray Disc Association
Filename extension	xxxxx.bdjo
Limits	1,001 Objects allowed
Open Format?	Yes
Free Format?	?
Magic Number	BDJO0100BDJO0200 (BD) BDJO0300 (UHD-BD)

 There are two types of programmable "Objects", Movie Objects (HDMV mode) and BD-J Objects (BD-J mode). 

A Movie Object is an executable object file with a set of navigation commands that start playlist playback upon user instruction or execute another Movie Object. Its magic numbers are MOBJ0100 and MOBJ0200. For Ultra HD Blu-ray, its magic numbers are MOBJ0300.

A BD-J Object is a table of Java applications or command programs called Xlets, that trigger Playlist playback, other Movie or BD-J Objects, and Java programs. Its magic numbers are BDJO0100 and BDJO0200. For Ultra HD Blu-ray, its magic numbers are BDJO0300.

Both of these types of Objects can be mixed together in the same disc. Movie Objects are stored in the MovieObject.bdmv file and BD-J Objects are stored in the BDJO directory. Only 1,001 Objects are allowed.

Author(s) : Æ Firestone