MP4ConvertFromTrackDuration - Convert a duration from the track time
scale to a specified time scale.
hFile Specifies the mp4 file to which the operation applies.
Specifies the track from which the duration originates.
Specifies the duration that is to be converted.
Specifies the new time scale in ticks per second to which the
duration should be converted.
Upon success, the duration in the new time scale units. Upon error, 0.
MP4ConvertFromTrackDuration converts a duration such as a sample
duration from the track time scale to another specified time scale.
This can be used by a player application to map all track samples to a
common time scale.
MP4(3) MP4GetSampleDuration(3) MP4ConvertToTrackDuration(3)