Quicktime File Format (2012-08-14).pdf

Movie AtomsTrack AtomsFigure 2-12 (page 66) shows the layout of this atom.Figure 2-12The layout of a track encoded pixels dimensions atomTrack Encoded PixelsDimensions atomAtom sizeType = 'enof'VersionFlagsBytes4413Width 4Height 4SizeA 32-bit integer that specifies the number of bytes in the track aperture mode dimensions atom.TypeA 32-bit integer that identifies the atom type; this field must be set to ‘enof’.VersionA 1-byte specification of the version of this atom.FlagsThree bytes that are reserved for the atom flags.WidthA 32-bit fixed-point number that specifies the width of the track encoded pixels dimensions in pixels.HeightA 32-bit fixed-point number that specifies the height of the track encoded pixels dimensions in pixels.Clipping AtomsClipping atoms specify the clipping regions for movies and for tracks. The clipping atom has an atom typevalue of 'clip'.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.66