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

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Media Data Atom TypesSound MediaaudioSampleRateA 64-bit floating point number representing the number of audio frames per second, for example: 44,100.0.numAudioChannelsA 32-bit integer field set to the number of audio channels; any channel assignment will be expressed inan extension.always7F000000A 32-bit integer field that must be set to 0x7F000000.constBitsPerChannelA 32-bit integer field which is set only if constant and only for uncompressed audio. For all other casesset to 0.formatSpecificFlagsA 32-bit integer field which carries LPCM flag values defined in “LPCM flag values” (page 183) below.constBytesPerAudioPacketA 32-bit unsigned integer set to the number of bytes per packet only if this value is constant. For othercases set to 0.constLPCMFramesPerAudioPacketA 32-bit unsigned integer set to the number of PCM frames per packet only if this value is constant. Forother cases set to 0.Some definitions for sound sample description version 2:●LPCM Frame: one uncompressed sample in each of the channels (for instance, 44100Hz audio has 44100LPCM frames per second, whether it is mono, stereo, 5.1, or other possible values). In other words, LPCMFrames divided by the audioSampleRate value is duration in seconds.●●Audio Packet: For compressed audio, an audio packet is the natural compressed access unit of that format.For uncompressed audio, an audio packet is simply one LPCM frame.Fields prefixed by “const”: Note the three sound sample description v2 fields whose names start with"const". These fields are only nonzero if the value is a constant. A zero in each field implies that the valueis variable. For example: AAC audio would have a zero in constBytesPerAudioPacket because AAChas variable sized audio packets. Codecs with variable duration audio packets set a zero inconstLPCMFramesPerAudioPacket.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.182
Media Data Atom TypesSound MediaLPCM flag valuesThe formatSpecificFlags field carries flags significant to the layout and formatting of audio streams definedin the Core Audio underpinnings for sound sample description v2. These are enumerated in the AppleQuickTime/CoreAudioFormat.h interface file and are subject to a fuller interpretation in the context of theAudioStreamBasicDescription data type. See the CoreAudio, “Core Audio Framework Reference” in theOS X Developer Library.enum{kAudioFormatFlagIsFloat = (1
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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 AtomsS
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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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Movie AtomsReference MoviesFlagsA 3
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MetadataThis chapter describes how
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MetadataMetadata StructureFigure 3-
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Page 190 and 191: Media Data Atom TypesTimecode Media
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Page 208 and 209: Media Data Atom TypesSprite MediaSp
Page 210 and 211: Media Data Atom TypesSprite Track P
Page 212 and 213: Media Data Atom TypesSprite Track M
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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 ScenariosC
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Some Useful Examples and ScenariosP
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Some Useful Examples and ScenariosA
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Some Useful Examples and ScenariosI
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Some Useful Examples and ScenariosR
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Some Useful Examples and ScenariosG
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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 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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