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

QuickTime Image File FormatNote The QuickTime Image File Format is deprecated in the QuickTime file format. The informationthat follows is intended to document existing content containing QuickTime image file media andshould not be used for new development.This appendix describes QuickTime image files, which provide a useful container for QuickTime-compressedstill images.Most still image file formats define both how images should be stored and compressed. However, the QuickTimeimage file format is a container format, which describes a storage mechanism independent of compression.The QuickTime image file format uses the same atom-based structure as a QuickTime movie.Atom Types in QuickTime Image FilesThere are two mandatory atom types: 'idsc', which contains an image description, and 'idat', whichcontains the image data. This is illustrated in Figure A-1 (page 371). A QuickTime image file can also containother atoms.In QuickTime 4, there is a new optional atom type 'iicc', which can store a ColorSync profile.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.370