NAME
MP4GetTrackVideoHeight - Get the video height in pixels of the
specified video track
SYNTAX
#include <mp4.h>
u_int16_t MP4GetTrackVideoHeight(
MP4FileHandle hFile,
MP4TrackId trackId
)
ARGUMENTS
hFile Specifies the mp4 file to which the operation applies.
trackId
Specifies the track for which the video height is desired.
RETURN VALUES
Upon success, the number of pixels of the video height in the track.
Upon an error, 0.
DESCRIPTION
MP4GetTrackVideoWidth returns the height 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 240 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) MP4GetTrackVideoWidth(3) MP4GetTrackESConfiguration(3)