MP4 - Online Linux Manual PageSection : 3
Updated : Version 0.9
Source : Cisco Systems Inc.
Note : MP4 File Format Library

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NAMEMP4GetSampleIdFromEditTime − Get the sample id of a specified time in the edit list timeline

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SYNTAX#include <mp4.h> MP4SampleId MP4GetSampleIdFromEditTime(
MP4FileHandle hFile,
MP4TrackId trackId,
MP4Timestamp when,
MP4Timestamp* pStartTime = NULL,
MP4Duration* pDuration = NULL
);

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ARGUMENTShFile  Specifies the mp4 file to which the operation applies. trackId  Specifies the track to which the operation applies. when  Specifies the time in the track time scale that is desired. pStartTime  If non−NULL, pointer to variable that will receive the starting timestamp for this sample. Caveat: The timestamp is in the track edit list timescale. pDuration  If non−NULL, pointer to variable that will receive the duration for this sample in the edit list timeline. Caveat: The duration is in the track timescale units.

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RETURN VALUESUpon success, the sample id that occurs at the specified time. Upon an error, MP4_INVALID_SAMPLE_ID.

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DESCRIPTIONMP4GetSampleIdFromEditTime returns the sample id of the track sample in which the specified time occurs in the edit list timeline. The specified time should be in the track time scale. See MP4ConvertToTrackTimestamp() for how to map a time value to this time scale. Since the edit list can cause the sample start time and duration to be different that it in the standard track timeline, it is strongly advised that the caller retrieve the new sample start time and duration via this function.

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SEE ALSOMP4(3) MP4GetSampleIdFromTime(3) 0

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