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

6       MP4ConvertFromTrackTimestamp  - Convert a timestamp from the track time
7       scale to a specified time scale.
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SYNTAX

10       #include <mp4.h>
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12       u_int64_t MP4ConvertFromTrackTimestamp(
13            MP4FileHandle hFile,
14            MP4TrackId trackId,
15            MP4Timestamp timestamp,
16            u_int32_t newTimeScale
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 timestamp originates.
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25       timestamp
26              Specifies the timestamp 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              timestamp should be converted.
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RETURN VALUES

33       Upon  success,  the  timestamp in the new time scale units. Upon error,
34       0xFFFFFFFFFFFFFFFF.
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DESCRIPTION

37       MP4ConvertFromTrackTimestamp converts a  timestamp  such  as  a  sample
38       start  time  from the track time scale to another specified time scale.
39       This can be used by a player application to map all track samples to  a
40       common time scale.
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SEE ALSO

44       MP4(3) MP4ConvertToTrackTimestamp(3)
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48Cisco Systems Inc.                Version 0.9                           MP4(3)