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

Media Data Atom TypesVideo Mediawhich contains indexes into a table of canonical references. This provides support for multiple video standardswithout opening the door to data entry errors for stored coefficient values. Refer to the published standardsfor the formulas and methods used to derive conversion coefficients from the table entries.JPEGQuickTime stores JPEG images according to the rules described in the ISO JPEG specification, document numberDIS 10918-1.MPEG-4 VideoMPEG-4 video uses the 'mp4v' data format. The sample description requires the elementary stream descriptor('esds') extension to the standard video sample description. If non-square pixels are used, the pixel aspectratio ('pasp') extension is also required. For details on these extensions, see “Pixel Aspect Ratio ('pasp')” (page159) and “MPEG-4 Elementary Stream Descriptor Atom ('esds')” (page 160).MPEG-4 video conforms to ISO/IEC documents 14496-1/2000(E) and 14496-2:1999/Amd.1:2000(E).Motion-JPEGMotion-JPEG (M-JPEG) is a variant of the ISO JPEG specification for use with digital video streams. Instead ofcompressing an entire image into a single bitstream, Motion-JPEG compresses each video field separately,returning the resulting JPEG bitstreams consecutively in a single frame.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.171