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

Movie AtomsTrack AtomsFigure 2-9 (page 63) shows the layout of the track aperture mode dimensions atom.Figure 2-9The layout of a track aperture mode dimensions atomTrack Aperture Mode Dimensions atomAtom sizeType ='tapt'Track Clean Aperture Dimension atomTrack Production Apeture Dimensions atomTrack Encoded Pixels Dimension atom'clef''prof''enof'SizeA 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 ‘tapt’.Track Clean Aperture Dimensions atomSee “Track Clean Aperture Dimensions Atom” (page 63)Track Production Aperture Dimensions atomSee “Track Production Aperture Dimensions Atom” (page 64)Track Encoded Pixels Dimensions atomSee “Track Encoded Pixels Dimensions Atom” (page 65)Track Clean Aperture Dimensions AtomThis atom carries the pixel dimensions of the track’s clean aperture. The type of the track clean aperturedimensions atom is ‘clef’.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.63