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

MetadataMetadata StructureFigure 3-1 (page 130) shows a sample layout for this atom.Figure 3-1Sample of a metadata atom and subatomsMetadata atomAtom sizeType = 'meta'Metadata handler atom'hdlr'Metadata header atomMetadata item keys atom'mhdr''keys'Metadata item list atom'ilst'Metadata item atom ''Value atomItem information atomName atom'data''itif''name'Country list atomLanguage list atom'ctry''lang'RequiredOptionalMetadata Handler AtomThe metadata handler atom is a full atom with an atom type of ‘hdlr’. It defines the structure used for alltypes of metadata stored within the metadata atom.The layout of the metadata handler atom is defined:SizeA 32-bit unsigned integer that indicates the size in bytes of the atom structureTypeA 32-bit unsigned integer value set to 'hdlr'VersionOne byte that is set to 0FlagsThree bytes that are set to 02012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.130