.TS file signature
A MPEG transport stream file begins with the bytes 47 at the start of the file. The signature is the same whatever the file is named, which is why a renamed or extensionless MPEGTS file is still recognisable.
Signature
| Offset | Hex | ASCII |
|---|---|---|
| 0 | 47Sync byte 0x47 at the start of every 188-byte packet: offsets 0, 188, 376 and so on. Blu-ray .m2ts packets are 192 bytes with a 4-byte timestamp first. |
MIME type: video/mp2t · usual extensions: .ts, .m2ts, .mts
How to check a file's signature
Without installing anything: drop the file on our detector. It reads the bytes in your browser and shows the hex dump alongside the verdict; nothing is uploaded.
macOS and Linux (Terminal):
xxd -l 32 file.ts
file file.tsWindows (PowerShell):
Format-Hex -Path file.ts -Count 32If the bytes do not match
A file named .ts whose first bytes are something else is not a MPEGTS file. The common explanations are a wrong or deliberately misleading extension, a download that saved an HTML error page instead of the file, or a container such as ZIP wrapping the real content. The detector reports what the bytes say; the MPEGTS guide explains what a genuine file should contain.