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

QuickTime Image File FormatRecommended File Type and Suffix004800000048000000003C5700010C 50 68 6F 74 6F 20 2D20Horizontal resolution, 72 dpiVertical resolution, 72 dpiData size, 15447 bytes (use 0 if unknown)Frame count, 1Compressor name, "Photo - JPEG" (32-byte Pascal string)4A 50 45 47 00 00 0000 00 00 00 00 00 00 0000 00 00 00 00 00 00 000018FFFF00003C5F69646174FF D8 FF E0 00 10 4A 46Image bit depth, 24Color lookup table ID, -1 (none)Atom size, 15455 bytesAtom type, 'idat'JPEG compressed data49 46 00 01 01 01 00 48...Important The exact order and size of atoms is not guaranteed to match the example in Figure A-1 (page371). Applications reading QuickTime image files should always use the atom size to traverse the file andignore atoms of unrecognized types.Note Like QuickTime movie files, QuickTime image files are big-endian. However, image data istypically stored in the same byte order as specified by the particular compression format.Recommended File Type and SuffixOn Mac OS systems, QuickTime image files are identified by the file type 'qtif'. Apple recommends usingthe filename extension .QIF to identify QuickTime image files.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.372