Atom Types Table 4-1 lists the atom types defined by Apple and their corresponding constants and atom names. Table 4-1 Apple-defined atom types ConstantAtom typeAtom name MovieAID'moov'Movie atom MovieHeaderAID'mvhd'Movie header atom ClipAID'clip'Clipping atom RgnClipAID'crgn'Clipping region atom MatteAID'matt'Track matte atom MatteCompAID'kmat'Compressed matte atom TrackAID'trak'Track atom UserDataAID'udta'User-defined data atom TrackHeaderAID'tkhd'Track header atom EditsAID'edts'Edit atom EditsListAID'elst'Edit list atom MediaAID'mdia'Media atom MediaHeaderAID'mdhd'Media header atom MediaInfoAID'minf'Media information atom VideoMediaInfoHeaderAID'vmhd'Video media information header atom SoundMediaInfoHeaderAID'smhd'Sound media information header atom DataInfoAID'dinf'Data information atom DataRefAID'dref'Data reference atom SampleTableAID'stbl'Sample table atom STSampleDescAID'stsd'Sample description atom STTimeToSampAID'stts'Time-to-sample atom STSyncSampleAID'stss'Sync sample atom STShadowSyncAID'stsh'Shadow sync atom STSampleToChunkAID'stsc'Sample-to-chunk atom HandlerAID'hdlr'Handler reference atom STSampleSizeAID'stsz'Sample size atom STChunkOffsetAID'stco'Chunk offset atom
