Microsoft Windows Media Audio/Video File
application/octet-stream
Magic Bytes
Offset: 0
30 26 B2 75 8E 66 CF 11 A6 D9 00 AA 00 62 CE 6C
The Microsoft Windows Media Audio/Video File (WMV) is a proprietary series of video compression codecs and containers developed by Microsoft for the Windows Media framework. It is primarily utilized for online video streaming and local media playback, maintaining compatibility with Windows Media Player and various third-party multimedia applications. While largely considered a legacy format today, it remains relevant for maintaining backward compatibility within older Windows operating environments and dedicated digital media devices.
Validation Code
How to validate .wmv files in Python
Python
def is_wmv(file_path: str) -> bool:
"""Check if file is a valid WMV by magic bytes."""
signature = bytes([0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C])
with open(file_path, "rb") as f:
return f.read(16) == signatureHow to validate .wmv files in Node.js
Node.js
function isWMV(buffer: Buffer): boolean {
const signature = Buffer.from([0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C]);
return buffer.subarray(0, 16).equals(signature);
}
Go
func IsWMV(data []byte) bool {
signature := []byte{0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}
if len(data) < 16 {
return false
}
return bytes.Equal(data[:16], signature)
}API Endpoint
GET
/api/v1/wmv
curl https://filesignature.org/api/v1/wmv