Here you have the sepecification of the subpicture file format created by VobEdit.
2 bytes Identifier: 'SP' | 8 bytes PTS of this subpicture | The raw subpicture frame data. |
For each presented subpicture, VobEdit creates a 10 bytes
header.
The first 2 bytes are used as identifier and simply contain the characters:
'SP'.
The next 8 bytes contain the true PTS value (Prestentation Time Stamp) when this
subpicture will be presented.
Finally the raw subpicture frame data of the VOB file gets appended to the
header.
Then follows the next header and subpicture and so forth...