MPG4 (.mpg4)
.mpg4 file signature | video/mp4
Magic Bytes
Offset 4
66 74 79 70 6D 70 34 31
Sources: Apache Tika
All Known Signatures
2 signature variants are documented for .mpg4 files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 66 74 79 70 6D 70 34 31 | 4 | Apache Tika |
| 66 74 79 70 6D 70 34 32 | 4 | Apache Tika |
Extension
.mpg4
MIME Type
video/mp4
Byte Offset
4
Risk Level
Safe
Validation Code
How to validate .mpg4 files in Python
def is_mpg4(file_path: str) -> bool:
"""Check if file is a valid MPG4 by magic bytes."""
signature = bytes([0x66, 0x74, 0x79, 0x70, 0x6D, 0x70, 0x34, 0x31])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .mpg4 files in Node.js
function isMPG4(buffer: Buffer): boolean {
const signature = Buffer.from([0x66, 0x74, 0x79, 0x70, 0x6D, 0x70, 0x34, 0x31]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .mpg4 files in Go
func IsMPG4(data []byte) bool {
signature := []byte{0x66, 0x74, 0x79, 0x70, 0x6D, 0x70, 0x34, 0x31}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/mpg4
curl https://filesignature.org/api/v1/mpg4
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .mpg4 file?
A .mpg4 file is a MPG4 file.
What are the magic bytes for .mpg4 files?
The magic bytes for MPG4 files are 66 74 79 70 6D 70 34 31 at byte offset 4. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .mpg4 file?
To validate a .mpg4 file, read the first bytes of the file and compare them against the known magic bytes (66 74 79 70 6D 70 34 31) at offset 4. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .mpg4 files?
The primary MIME type for .mpg4 files is video/mp4.
Is it safe to open .mpg4 files?
MPG4 (.mpg4) 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.