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

Movie AtomsSample AtomsSync sample atomSee “Sync Sample Atoms” (page 107).Partial sync sample atomSee “Partial Sync Sample Atom” (page 108).Sample-to-chunk atomSee “Sample-to-Chunk Atoms” (page 109).Sample size atomSee “Sample Size Atoms” (page 111).Chunk offset atomSee “Chunk Offset Atoms” (page 113).Sample Dependency Flags atomSee “Sample Dependency Flags Atom” (page 115).Shadow sync atomReserved for future use.Sample Description AtomsThe sample description atom stores information that allows you to decode samples in the media. The datastored in the sample description varies, depending on the media type. For example, in the case of video media,the sample descriptions are image description structures. The sample description information for each mediatype is explained in “Media Data Atom Types” (page 154)Figure 2-34 (page 99) shows the layout of the sample description atom.Figure 2-34The layout of a sample description atomBytesSample description atomAtom sizeType = 'stsd'VersionFlagsNumber of entriesSample description table44134Variable2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.99