MK3D
application/octet-stream
Magic Bytes
Offset: 0
1A 45 DF A3
Matroska 3D (MK3D) is an open standard multimedia container format developed by the Matroska non-profit organization specifically for stereoscopic video. This file type encapsulates 3D video streams, audio tracks, and subtitles, allowing compatible media players to automatically detect and render depth information. Although it shares the underlying architecture of the common MKV format, the MK3D extension serves as a distinct indicator to hardware and software that specific 3D processing is required for optimal viewing.
Validation Code
How to validate .mk3d files in Python
Python
def is_mk3d(file_path: str) -> bool:
"""Check if file is a valid MK3D by magic bytes."""
signature = bytes([0x1A, 0x45, 0xDF, 0xA3])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .mk3d files in Node.js
Node.js
function isMK3D(buffer: Buffer): boolean {
const signature = Buffer.from([0x1A, 0x45, 0xDF, 0xA3]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsMK3D(data []byte) bool {
signature := []byte{0x1A, 0x45, 0xDF, 0xA3}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/mk3d
curl https://filesignature.org/api/v1/mk3d