1MP4(3) MP4 File Format Library MP4(3)
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6 MP4ConvertFromTrackDuration - Convert a duration from the track time
7 scale to a specified time scale.
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10 #include <mp4.h>
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12 u_int64_t MP4ConvertFromTrackDuration(
13 MP4FileHandle hFile,
14 MP4TrackId trackId,
15 MP4Duration duration,
16 u_int32_t newTimeScale
17 )
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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 newTimeScale
29 Specifies the new time scale in ticks per second to which the
30 duration should be converted.
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33 Upon success, the duration in the new time scale units. Upon error, 0.
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36 MP4ConvertFromTrackDuration converts a duration such as a sample dura‐
37 tion from the track time scale to another specified time scale. This
38 can be used by a player application to map all track samples to a com‐
39 mon time scale.
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43 MP4(3) MP4GetSampleDuration(3) MP4ConvertToTrackDuration(3)
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47Cisco Systems Inc. Version 0.9 MP4(3)