MP4ConvertToTrackDuration - Convert a duration from a specified time
scale to the track 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 time scale in ticks per second in which the
duration is currently expressed.
Upon success, the duration in the track time scale units. Upon error,
MP4ConvertToTrackDuration converts a duration such as a sample duration
from the specified time scale to the track time scale.