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VocalTec VoIP media file (.vmd)

.vmd file signature | application/octet-stream

VocalTec VoIP media file (VMD) is a legacy media container format developed by VocalTec for its Internet telephony software. It was used to store voice recordings, greetings, and other audio content for VocalTec VoIP applications and related messaging systems. The format is largely obsolete, and files are generally safe to inspect, though support may be limited in modern media players.

Safe

Magic Bytes

Offset 0
5B 56 4D 44 5D

Sources: Gary Kessler

Extension

.vmd

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .vmd files in Python

Python 
def is_vmd(file_path: str) -> bool:
    """Check if file is a valid VMD by magic bytes."""
    signature = bytes([0x5B, 0x56, 0x4D, 0x44, 0x5D])
    with open(file_path, "rb") as f:
        return f.read(5) == signature

How to validate .vmd files in Node.js

Node.js 
function isVMD(buffer: Buffer): boolean {
  const signature = Buffer.from([0x5B, 0x56, 0x4D, 0x44, 0x5D]);
  return buffer.subarray(0, 5).equals(signature);
}

How to validate .vmd files in Go

Go 
func IsVMD(data []byte) bool {
    signature := []byte{0x5B, 0x56, 0x4D, 0x44, 0x5D}
    if len(data) < 5 {
        return false
    }
    return bytes.Equal(data[:5], signature)
}

API Endpoint

GET /api/v1/vmd
curl https://filesignature.org/api/v1/vmd

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .vmd file?

A .vmd file is a VocalTec VoIP media file file. VocalTec VoIP media file (VMD) is a legacy media container format developed by VocalTec for its Internet telephony software. It was used to store voice recordings, greetings, and other audio content for VocalTec VoIP applications and related messaging systems. The format is largely obsolete, and files are generally safe to inspect, though support may be limited in modern media players.

What are the magic bytes for .vmd files?

The magic bytes for VocalTec VoIP media file files are 5B 56 4D 44 5D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .vmd file?

To validate a .vmd file, read the first bytes of the file and compare them against the known magic bytes (5B 56 4D 44 5D) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .vmd files?

There is no officially registered MIME type for .vmd files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .vmd files?

VocalTec VoIP media file (.vmd) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.