1MP4(3) MP4 File Format Library MP4(3)
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6 MP4SetTrackTimeScale - Set the time scale of a track
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9 #include <mp4.h>
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11 bool MP4SetTrackTimeScale(
12 MP4FileHandle hFile,
13 MP4TrackId trackId,
14 u_int32_t timeScale
15 )
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18 hFile Specifies the mp4 file to which the operation applies.
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20 trackId
21 Specifies the track to which the operation applies.
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23 timeScale
24 Specifies the desired time scale for the track.
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27 Upon success, true (1). Upon an error, false (0).
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30 MP4SetTrackTimeScale sets the time scale of the specified track in the
31 mp4 file. The time scale determines the number of clock ticks per sec‐
32 ond for this track.
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34 Typically this value is set once when the track is created. However
35 this call can be used to modify the value if that is desired. Since
36 track sample durations are expressed in units of the track time scale,
37 any change to the time scale value will effect the real time duration
38 of the samples.
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41 MP4(3)
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45Cisco Systems Inc. Version 0.9 MP4(3)