MJ2

MJ2 (also known as Motion JPEG 2000 or Motion JPEG2000) is a video format defined by Part 3 of the JPEG 2000 standard. MJ2 supports audio as well.

Format
Like the other JPEG 2000 file formats, MJ2 files are structured as a sequence of objects called boxes. Unlike the other JPEG 2000 formats, MJ2 is based on ISO Base Media File Format. Codestreams in Motion JPEG 2000 files are JP2 codestreams, as defined for JPEG 2000.

Identifiers
The registered MIME type is video/mj2. At least one document says it is video/mjp2 instead.

The preferred filename extension is .mj2. The MIME type registration lists .mjp2 as an alternate extension.

Identification
MJ2 files start with bytes.

Software

 * Konvertor

Specifications

 * ISO/IEC 15444-3
 * ITU-T Rec. T.802 (not free to download)
 * JPEG 2000 Committee Drafts → fcd15444-3.pdf

Sample files

 * OpenJPEG samples → Speedway.mj2

Links

 * JPEG 2000
 * JPEG 2000 standard
 * JPEG 2000 Part 3 web site