MJP2
video/mj2
Magic Bytes
Offset: 0
00 00 00 0C 6A 50 20 20 0D 0A 87 0A
Motion JPEG 2000 (MJP2) is a video file format defined by the Joint Photographic Experts Group as part of the ISO/IEC 15444-3 standard. It functions by treating each video frame as a discrete JPEG 2000 image, making it suitable for high-quality professional archival, medical imaging, and digital cinema. Despite offering robust lossless compression, the format achieved limited consumer adoption compared to MPEG alternatives and is currently regarded as a specialized legacy standard.
Validation Code
How to validate .mjp2 files in Python
Python
def is_mjp2(file_path: str) -> bool:
"""Check if file is a valid MJP2 by magic bytes."""
signature = bytes([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A])
with open(file_path, "rb") as f:
return f.read(12) == signatureHow to validate .mjp2 files in Node.js
Node.js
function isMJP2(buffer: Buffer): boolean {
const signature = Buffer.from([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A]);
return buffer.subarray(0, 12).equals(signature);
}
Go
func IsMJP2(data []byte) bool {
signature := []byte{0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A}
if len(data) < 12 {
return false
}
return bytes.Equal(data[:12], signature)
}API Endpoint
GET
/api/v1/mjp2
curl https://filesignature.org/api/v1/mjp2