1MP4(3) MP4 File Format Library MP4(3)
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6 MP4GetSampleTime - Get the start time of a track sample
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9 #include <mp4.h>
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11 MP4Timestamp MP4GetSampleTime(
12 MP4FileHandle hFile,
13 MP4TrackId trackId,
14 MP4SampleId sampleId
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 sampleId
24 Specifies the sample to which the operation applies. Caveat: the
25 first sample has id 1 not 0.
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29 Upon success, the sample start time in track time scale units. Upon an
30 error, MP4_INVALID_TIMESTAMP.
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33 MP4GetSampleTime returns the start time of the specified sample from
34 the specified track in the track time scale units. See MP4ConvertFromâ
35 TrackTimestamp() for how to map this value to another time scale.
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38 MP4(3) MP4ConvertFromTrackDuration(3)
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42Cisco Systems Inc. Version 0.9 MP4(3)