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

6       MP4GetTrackVideoHeight  -  Get the video height in pixels of the speci‐
7       fied video track
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SYNTAX

10       #include <mp4.h>
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12       u_int16_t MP4GetTrackVideoHeight(
13            MP4FileHandle hFile,
14            MP4TrackId trackId
15       )
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ARGUMENTS

18       hFile  Specifies the mp4 file to which the operation applies.
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20       trackId
21              Specifies the track for which the video height is desired.
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RETURN VALUES

24       Upon success, the number of pixels of the video height  in  the  track.
25       Upon an error, 0.
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DESCRIPTION

28       MP4GetTrackVideoWidth  returns the height of the video in pixels in the
29       specified track in the mp4 file.
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31       Caveat: Not all mp4 implementations set this value accurately. The  mp4
32       specification states that the authoritative values are contained in the
33       track ES configuration which is video encoding specific, and hence  not
34       interpretable  by  the  mp4  library.  If the value of 240 is returned,
35       care should be taken to verify the accuracy of this value since this is
36       the default value in the mp4 specification.
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SEE ALSO

39       MP4(3) MP4GetTrackVideoWidth(3) MP4GetTrackESConfiguration(3)
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43Cisco Systems Inc.                Version 0.9                           MP4(3)
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