MP4SetTrackEditMediaStart - Man Page
Set the media start time of a track edit segment
Syntax
#include <mp4.h>
bool MP4SetTrackEditMediaStart(
MP4FileHandle hFile,
MP4TrackId trackId,
MP4EditId editId,
MP4Timestamp mediaStartTime
);
Arguments
- hFile
Specifies the mp4 file to which the operation applies.
- trackId
Specifies the track to which the operation applies.
- editId
Specifies the edit segment to which the operation applies. Caveat: the first edit has id 1 not 0.
- mediaStartTime
Species the new value for the media start in track time scale units.
Return Values
Upon success, true (1). Upon an error, false (0).
Description
MP4SetTrackEditMediaStart sets the media start time of the specified edit segment from the specified track in the track time scale units. See MP4ConvertToTrackTimestamp() for how to map this value from another time scale.
Note that this differs from the edit segment start time. For example:
EditId Start MediaStart Duration
| 1 | 0 | 15 | 30 |
| 2 | 30 | 120 | 20 |
| 3 | 50 | 3000 | 10 |