Motion JPEG 2000
| Filename extension | .mj2, .mjp2 |
|---|---|
| Internet media type | video/mj2 |
| Magic number | 12 byte string: X'0000 000C 6A50 2020 0D0A 870A' |
| Developed by | Joint Photographic Experts Group |
| Type of format | moving image |
| Container for | video, sound |
| Extended from | ISO base media file format |
| Extended to | Motion JPEG 2000 Simple Profile, Motion JPEG 2000 Motion Picture Archive Preservation Format Profile, Motion JPEG 2000 Motion Picture Archive Access Format Profile |
| Standard | ISO/IEC 15444-3:2007, ITU-T T.802 |
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Motion JPEG 2000 (MJ2 or MJP2) is a file format for motion sequences of JPEG 2000 images and associated audio, based on the MP4/QuickTime format. Filename extensions for Motion JPEG 2000 video files are .mj2 and .mjp2, as defined in RFC 3745.
ISO Standards
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MJ2, first defined by Part 3 of the ISO Standard for JPEG 2000 ISO/IEC 15444 in November 2001[1] (ISO/IEC 15444-3:2002) as a standalone document, has later been defined by ISO/IEC 15444-3:2007, ISO/IEC 15444-3:2007/Amd 1:2010, additional profiles for archiving applications, and by ISO/IEC 15444-12 which defines the JPEG 2000 base media format, which contains the timing, structure, and media information for timed sequences of media data.
The standard is available for download from ITU-T as their Recommendation T.802.[2]
MPEG vs MJ2
Motion JPEG2000 was always intended to coexist with MPEG. Unlike MPEG, MJ2 does not implement inter-frame coding; each frame is coded independently using JPEG 2000. This makes MJ2 more resilient to propagation of errors over time, more scalable, and better suited to networked and point-to-point environments, with additional advantages over MPEG with respect to random frame access,[3] but at the expense of increased storage and bandwidth requirements.
See also
References
- digitalpreservation.gov Motion JPEG 2000 File Format Sustainability of Digital Formats - Planning for Library of Congress Collections
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<references />, or <references group="..." />External links
- JPEG 2000 Official website, part 3 Motion JPEG 2000.
- Digital cinema reels from motion JPEG2000 advances
- OpenJPEG homepage open-source JPEG 2000 codec written in C, developed to promote the use of JPEG 2000.
- GitHub page for OpenJPEG
- Documentation for the Openjpeg Motion JPEG 2000 utilities.
