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MP4(3)			    MP4	File Format Library			MP4(3)

NAME
       MP4GetTrackVideoWidth  -	Get the	video width in pixels of the specified
       video track

SYNTAX
       #include	<mp4.h>

       u_int16_t MP4GetTrackVideoWidth(
	    MP4FileHandle hFile,
	    MP4TrackId trackId
       )

ARGUMENTS
       hFile  Specifies	the mp4	file to	which the operation applies.

       trackId
	      Specifies	the track for which the	video width is desired.

RETURN VALUES
       Upon success, the number	of pixels of the video	width  in  the	track.
       Upon an error, 0.

DESCRIPTION
       MP4GetTrackVideoWidth  returns  the width of the	video in pixels	in the
       specified track in the mp4 file.

       Caveat: Not all mp4 implementations set this value accurately. The  mp4
       specification states that the authoritative values are contained	in the
       track ES	configuration which is video encoding specific,	and hence  not
       interpretable  by  the  mp4  library.  If the value of 320 is returned,
       care should be taken to verify the accuracy of this value since this is
       the default value in the	mp4 specification.

SEE ALSO
       MP4(3) MP4GetTrackVideoHeight(3)	MP4GetTrackESConfiguration(3)

Cisco Systems Inc.		  Version 0.9				MP4(3)

NAME | SYNTAX | ARGUMENTS | RETURN VALUES | DESCRIPTION | SEE ALSO

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