SBV (.sbv)
.sbv file signature | application/octet-stream
SBV is a plain-text subtitle format used by YouTube and maintained as part of its captioning workflow. It is primarily used for timed captions in uploaded videos, including subtitles for accessibility, translation, and basic transcription in editing or playback tools. The format has a simple structure and is generally safe, though, like other text-based subtitle files, it should be reviewed carefully when imported into media software from untrusted sources.
Magic Bytes
Offset 0
46 45 44 46
Sources: Gary Kessler
Extension
.sbv
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .sbv files in Python
def is_sbv(file_path: str) -> bool:
"""Check if file is a valid SBV by magic bytes."""
signature = bytes([0x46, 0x45, 0x44, 0x46])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .sbv files in Node.js
function isSBV(buffer: Buffer): boolean {
const signature = Buffer.from([0x46, 0x45, 0x44, 0x46]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .sbv files in Go
func IsSBV(data []byte) bool {
signature := []byte{0x46, 0x45, 0x44, 0x46}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/sbv
curl https://filesignature.org/api/v1/sbv
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .sbv file?
A .sbv file is identified by the magic bytes 46 45 44 46 at byte offset 0. SBV is a plain-text subtitle format used by YouTube and maintained as part of its captioning workflow. It is primarily used for timed captions in uploaded videos, including subtitles for accessibility, translation, and basic transcription in editing or playback tools. The format has a simple structure and is generally safe, though, like other text-based subtitle files, it should be reviewed carefully when imported into media software from untrusted sources.
What are the magic bytes for .sbv files?
The magic bytes for SBV files are 46 45 44 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .sbv file?
To validate a .sbv file, read the first bytes of the file and compare them against the known magic bytes (46 45 44 46) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .sbv files?
There is no officially registered MIME type for .sbv files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .sbv files?
SBV (.sbv) 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.