1MP4(3)                      MP4 File Format Library                     MP4(3)
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NAME

6       MP4ConvertToTrackDuration  -  Convert  a duration from a specified time
7       scale to the track time scale.
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SYNTAX

10       #include <mp4.h>
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12       MP4Duration MP4ConvertToTrackDuration(
13            MP4FileHandle hFile,
14            MP4TrackId trackId,
15            u_int64_t duration,
16            u_int32_t oldTimeScale
17       )
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ARGUMENTS

20       hFile  Specifies the mp4 file to which the operation applies.
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22       trackId
23              Specifies the track from which the duration originates.
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25       duration
26              Specifies the duration that is to be converted.
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28       oldTimeScale
29              Specifies the time scale in ticks per second in which the  dura‐
30              tion is currently expressed.
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RETURN VALUES

33       Upon  success,  the duration in the track time scale units. Upon error,
34       MP4_INVALID_DURATION.
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DESCRIPTION

37       MP4ConvertToTrackDuration converts a duration such as a sample duration
38       from the specified time scale to the track time scale.
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SEE ALSO

41       MP4(3) MP4ConvertFromTrackDuration(3)
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45Cisco Systems Inc.                Version 0.9                           MP4(3)