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

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Media Data Atom TypesSound MediaSound MediaSound media is used to store compressed and uncompressed audio data in QuickTime movies. It has a mediatype of 'soun'. This section describes the sound sample description and the storage format of sound files usingvarious data formats.Sound Sample DescriptionsThe sound sample description contains information that defines how to interpret sound media data. Thissample description is based on the standard sample description, as described in “Sample DescriptionAtoms” (page 99).The data format field contains the format of the audio data. This may specify a compression format or one ofseveral uncompressed audio formats. Table 4-7 (page 176) shows a list of some supported sound formats.Table 4-7Partial list of supported QuickTime audio formats.FormatNot specifiedkSoundNotCompressedk8BitOffsetBinary-Formatk16BitBigEndianFormatk16BitLittleEndian-Format4-Charactercode0x00000000'NONE''raw ''twos''sowt'DescriptionThis format descriptor should not be used, butmay be found in some files. Samples are assumedto be stored in either 'raw ' or 'twos' format,depending on the sample size field in the sounddescription.This format descriptor should not be used, butmay be found in some files. Samples are assumedto be stored in either 'raw ' or 'twos' format,depending on the sample size field in the sounddescription.Samples are stored uncompressed, inoffset-binary format (values range from 0 to 255;128 is silence). These are stored as 8-bit offsetbinaries.Samples are stored uncompressed, intwo’s-complement format (sample values rangefrom -128 to 127 for 8-bit audio, and -32768 to32767 for 1- bit audio; 0 is always silence). Thesesamples are stored in 16-bit big-endian format.16-bit little-endian, twos-complement2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.176
Media Data Atom TypesSound MediaFormatkMACE3CompressionkMACE6CompressionkIMACompressionkFloat32FormatkFloat64Formatk24BitFormatk32BitFormatkULawCompressionkALawCompressionkMicrosoftADPCMFormatkDVIIntelIMAFormatkDVAudioFormatkQDesignCompressionkQDesign2CompressionkQUALCOMMCompressionkMPEGLayer3FormatkFullMPEGLay3FormatkMPEG4AudioFormatkAC3AudioFormat4-Charactercode'MAC3 ''MAC6 ''ima4''fl32''fl64''in24''in32''ulaw''alaw'0x6D7300020x6D730011'dvca''QDMC''QDM2''Qclp'0x6D730055'.mp3''mp4a''ac-3'DescriptionSamples have been compressed using MACE 3:1.(Obsolete.)Samples have been compressed using MACE 6:1.(Obsolete.)Samples have been compressed using IMA 4:1.32-bit floating point64-bit floating point24-bit integer32-bit integeruLaw 2:1uLaw 2:1Microsoft ADPCM-ACM code 2DVI/Intel IMAADPCM-ACM code 17DV AudioQDesign musicQDesign music version 2QUALCOMM PureVoiceMPEG-1 layer 3, CBR only (pre-QT4.1)MPEG-1 layer 3, CBR & VBR (QT4.1 and later)MPEG-4, Advanced Audio Coding (AAC)Digital Audio Compression Standard (AC-3,Enhanced AC-3)2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.177
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QuickTime File FormatSpecification
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ContentsReference Movie Atom 120Ref
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ContentsSprite Track Property Atoms
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ContentsSome Useful Examples and Sc
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ContentsAudio Sample Rate for a Sam
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Figures, Tables, and ListingsFigure
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Figures, Tables, and ListingsFigure
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Figures, Tables, and ListingsTable
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Introduction to QuickTime File Form
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Overview of QTFFQuickTime movies ar
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Overview of QTFFAtomsAtom LayoutFig
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Overview of QTFFQT Atoms and Atom C
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Overview of QTFFQuickTime Movie Fil
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Movie AtomsOverview of Movie AtomsO
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Movie AtomsOverview of Movie AtomsN
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Movie AtomsOverview of Movie AtomsC
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Movie AtomsOverview of Movie AtomsF
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Movie AtomsOverview of Movie AtomsF
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Movie AtomsOverview of Movie AtomsL
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Movie AtomsOverview of Movie AtomsA
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Movie AtomsTrack AtomsPrint to Vide
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Movie AtomsTrack AtomsNote Figure 2
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Movie AtomsTrack AtomsFigure 2-7 (p
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Movie AtomsTrack AtomsAlternate gro
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Movie AtomsTrack AtomsAlthough the
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Movie AtomsTrack AtomsFigure 2-10 (
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Movie AtomsTrack AtomsRegion sizeTh
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Movie AtomsTrack AtomsNote If the e
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Movie AtomsTrack AtomsTrack Input M
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Movie AtomsTrack AtomsInput typeA 3
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Movie AtomsMedia AtomsMedia atoms c
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Movie AtomsMedia AtomsTime scaleA t
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Movie AtomsMedia AtomsHandler Refer
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Movie AtomsMedia AtomsNote “Using
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Movie AtomsMedia AtomsOpcolorThree
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Movie AtomsMedia AtomsMedia types t
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Movie AtomsMedia AtomsFlagsA 3-byte
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Movie AtomsMedia AtomsData referenc
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Movie AtomsSample AtomsSamples are
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Movie AtomsSample AtomsFigure 2-33
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Movie AtomsSample AtomsThe sample d
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Movie AtomsSample AtomsSizeA 32-bit
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Movie AtomsSample AtomsNote At the
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Movie AtomsSample AtomsSizeA 32-bit
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Movie AtomsSample AtomsVersionA 1-b
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Movie AtomsSample AtomsNote The sam
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Movie AtomsSample AtomsSample depen
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Movie AtomsCompressed Movie Resourc
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Movie AtomsReference MoviesApplicat
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Movie AtomsReference MoviesData ref
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Movie AtomsReference MoviesCPU Spee
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Page 146 and 147: MetadataQuickTime Metadata KeysKeyK
Page 154 and 155: Media Data Atom TypesQuickTime uses
Page 156 and 157: Media Data Atom TypesVideo MediaCom
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Media Data Atom TypesWired Action G
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Media Data Atom TypesFlash MediakAc
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Media Data Atom TypesTween MediaTwe
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Media Data Atom TypesTween Media●
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Media Data Atom TypesTween MediakTw
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Media Data Atom TypesTween MediaTwe
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Media Data Atom TypesTrack Referenc
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Media Data Atom TypesStreaming Medi
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Media Data Atom TypesHint Media●
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Media Data Atom TypesHint MediaMovi
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Media Data Atom TypesHint Sample Da
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Media Data Atom TypesHint Sample Da
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Media Data Atom TypesPacketization
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Media Data Atom TypesVR Media} QTVR
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Media Data Atom TypesVR MediaUInt32
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Media Data Atom TypesVR Mediareserv
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Media Data Atom TypesCustom Cursor
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Media Data Atom TypesNode Informati
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Media Data Atom TypesQuickTime VR F
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Media Data Atom TypesQuickTime VR F
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Media Data Atom TypesQTVR TrackImpo
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Media Data Atom TypesPanorama Track
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Media Data Atom TypesCubic Panorama
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Media Data Atom TypesHot Spot Image
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Media Data Atom TypesObject TracksT
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Media Data Atom TypesObject Tracksd
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Media Data Atom TypesObject Tracksk
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Media Data Atom TypesObject Tracksk
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Media Data Atom TypesMovie MediaFor
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Media Data Atom TypesMovie MediaNot
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Media Data Atom TypesMovie MediakMo
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Basic Data TypesThis chapter descri
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Basic Data TypesLanguage Code Value
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Basic Data TypesCalendar Date and T
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Basic Data TypesRGB ColorsTable 5-3
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Some Useful Examples and ScenariosT
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Some Useful Examples and ScenariosO
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Some Useful Examples and ScenariosO
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QuickTime Image File FormatNote The
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QuickTime Image File FormatRecommen
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Defining Media Data LayoutsUsing Qu
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Random AccessSeeking With a QuickTi
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Metadata HandlingDigital Audio File
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Metadata HandlingStill Image File F
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Summary of VR World and Node Atom T
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Profile Atom GuidelinesProfile Atom
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Profile Atom GuidelinesUniversal Fe
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Audio Priming - Handling Encoder De
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Document Revision HistoryDate2011-0
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GlossaryAAC Advanced Audio Coding (
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Glossaryfile preview A thumbnail pi
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Glossarymedia’s data. The data ha
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GlossaryPCM Pulse-code modulation (
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Glossarytrack A Movie Toolbox data
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Apple Inc.© 2004, 2012 Apple Inc.A
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