Format
MJ2 (Motion JPEG 2000)
Summary
- Name
- MJ2 (Motion JPEG 2000)
- Identifiers
-
- Library of Congress Format Description Identifier: fdd000127
- PUID: fmt/337
- MIME: video/mj2
- Format type
- Video
- Family
- JPEG 2000
- Description
- Motion JPEG 2000 (MJ2) is a video file format known for its mathematically lossless compression, making it suitable for long-term video preservation. Standardized in 2002 as part of ISO/IEC’s JPEG 2000 (JP2) standard, MJ2 encodes timed sequences of images, with options for including audio. Unlike formats with temporal or inter-frame compression (e.g., MPEG-4), MJ2 compresses each video frame independently, enabling reversible, lossless quality. This feature makes it ideal for high-quality preservation, particularly for digitized film and analog videotape.
- Note
- https://www.loc.gov/preservation/digital/formats/fdd/fdd000127.shtml; https://www.iso.org/standard/41570.html; https://lhncbc.nlm.nih.gov/LHC-publications/PDF/pub9302.pdf
- File extensions
-
mj2,mjp2 - Submitted by
- Digital Preservation Department / The National Archives
Internal signatures
Motion JPEG 2000
- Description
- BOF: ....jP ..‡.{4}ftypmjp2
- Provenance
- jpeg 2000 (purchased) and Jpeg 2000 ISO 15444-3 - http://www.jpeg.org/public/fcd15444-3.pdf
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
0000000C6A5020200D0A870A{4}667479706D6A7032- Endianness
- None
Changelog
-
V120
- Release date
- 25 February 2025
-
Updated
MJ2 (Motion JPEG 2000): New description, library of congress fdd identifier and notes added as part of PRONOM Research Week 2024. Submitted by J. Paul Getty Trust.
-
V65
- Release date
- 25 October 2012
-
Updated
MJ2 (Motion JPEG 2000): Renamed from Motion JPEG 2000 for clarity and consistency.
-
V62
- Release date
- 28 August 2012
-
Added signature
Motion JPEG 2000: Signature developed through PRONOM Research.
-
V50
- Release date
- 20 May 2011
-
Added format
Motion JPEG2000: Outline entry added.