I second comment #48. Ubuntu 16.04 (well, Mint 18.3 Sylvia actually, but it uses Xenial repositories).
``` $ hexdump -C -n 16 0000.ts 00000000 47 ff ff 50 52 49 56 54 3a 04 00 00 39 04 00 00 |G..PRIVT:...9...| $ mimetype --all 0000.ts 0000.ts: text/vnd.trolltech.linguist 0000.ts: application/octet-stream
```
I second comment #48. Ubuntu 16.04 (well, Mint 18.3 Sylvia actually, but it uses Xenial repositories).
``` trolltech. linguist octet-stream
$ hexdump -C -n 16 0000.ts
00000000 47 ff ff 50 52 49 56 54 3a 04 00 00 39 04 00 00 |G..PRIVT:...9...|
$ mimetype --all 0000.ts
0000.ts: text/vnd.
0000.ts: application/
```