⎗ video/mj2

File Extensions

mj2, mjp2

Magic Bytes

1. JPEG 2000 signature (size + box code prefix) + ISOBMFF major brand prefix for JPEG 2000 Part 3

   Offset	0	1	2	3	4	20	21
   Byte	0x00	0x00	0x00	0x0c	0x6a	0x6d	0x6a
   Char					j	m	j

References

• Media Type Assignment
• RFC 3745 - Motion Registration
• LOC Digital Formats - JPEG 2000 Part 3
• MP4RA Brands
• ISOBMFF Major Brand Explanation