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

Movie AtomsSample AtomsNote At the last displayed frame, the decode duration is used as presentation duration.The type of the composition offset atom is ‘ctts’.Figure 2-38 (page 104) shows the layout of this atom.Figure 2-38The layout of a composition offset atomBytesComposition Offset atomAtom sizeType = 'ctts'VersionFlags4413Entry count 4Composition-offset tablevariableSizeA 32-bit integer that specifies the number of bytes in the composition offset atom.TypeA 32-bit integer that identifies the atom type; this field must be set to ‘ctts’.VersionA 1-byte specification of the version of this atom.FlagsA 3-byte space reserved for offset flags. Set this field to 0.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.104