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

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Profile Atom GuidelinesProfile Atom SpecificationFigure F-1 (page 396) shows the layout of the profile atom.Figure F-1The layout of a profile atomBytesProfile atomAtom sizeType = 'prfl'44Version 1Flags 3Number of feature entries 4Feature entriesn x 32Syntaxaligned(8) class ProfileAtomextends FullAtom('prfl') {unsigned int(32) feature-record-count;for (i=1; i
Profile Atom GuidelinesUniversal Featuresfeature-codeA four-character code either documented here (universal features), or in the specification identified bythe brand. The value of 0 is reserved for an empty slot with no meaningful feature-value.feature-valueEither a value from an enumerated set (for example, 1 or 0 for true or false, or an MPEG-4 profile-levelID) or a value that can compared (for example, bit rate as an integer or dimensions as a 32-bit packedstructure).The profile atom is a full atom, so it has an 8-bit version and 24 bits of flags. For this specification, the versionis 0 and the flags have the value 0. A reader compliant with this specification should treat any profile atomwith a nonzero version value as if it did not exist.Figure F-2 (page 397) shows the layout of a typical feature.Figure F-2Layout of a typical featureBytesReserved = 0x00000000Part ID = ' '(0x20202020)Feature Code = 'avbr'444Value = 0x000000014Universal FeaturesA feature consists of four fields: a reserved field, which is set to zero; a part-ID, which specifies which brandthe feature belongs to; a feature code, which identifies the feature; and a value field, which holds the featurevalue).The part-ID can be either universal or brand-specific. Universal features have a part-ID of four ASCII spaces(0x20202020). Brand-specific features have a part-ID for a particular brand, which is taken from theCompatible_brands field of the file type atom. Brand-specific features of QuickTime files have a part-ID of 'qt'. All features listed in this section are universal features; that is, they can be used in any file that includes aprofile atom.It is permissible to use the feature code of 0x00000000 as a placeholder, paired with a feature value of0x00000000 for one or more features. Readers should simply ignore features having a feature code of zero.No feature will exist to describe the unit of other features, such as bit rate. The device should consider themagnitude and tailor its display appropriately.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.397
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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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MetadataExtensibilityTypeA 32-bit u
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MetadataLanguage List AtomField Siz
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MetadataMetadata Item Keys AtomThis
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MetadataMetadata Item AtomFigure 3-
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MetadataLocale IndicatorValueotherw
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MetadataData Atom StructureNameAn a
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MetadataLocation MetadataLocation M
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MetadataQuickTime Metadata KeysKeyK
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Media Data Atom TypesQuickTime uses
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Media Data Atom TypesVideo MediaCom
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Media Data Atom TypesVideo MediaCol
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Media Data Atom TypesVideo MediaDes
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Media Data Atom TypesVideo MediaThe
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Media Data Atom TypesVideo MediaSch
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Media Data Atom TypesVideo MediaTab
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Media Data Atom TypesVideo MediaNot
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Media Data Atom TypesSound MediaSou
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Media Data Atom TypesSound MediaThe
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Media Data Atom TypesSound Mediaaud
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Media Data Atom TypesSound MediaTyp
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Media Data Atom TypesSound MediaThe
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Media Data Atom TypesTimecode Media
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Media Data Atom TypesTimecode Media
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Media Data Atom TypesText MediaDisp
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Media Data Atom TypesText MediaFore
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Media Data Atom TypesClosed Caption
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Media Data Atom TypesSubtitle Media
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Media Data Atom TypesMusic Media●
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Media Data Atom TypesSprite MediaSp
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Media Data Atom TypesSprite Track P
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Media Data Atom TypesSprite Track M
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Media Data Atom TypesSprite Track M
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Media Data Atom TypesSprite Media A
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Media Data Atom TypesSprite Media A
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Media Data Atom TypesSprite Button
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Media Data Atom TypesSprite Media H
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Media Data Atom TypesSprite Media H
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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 ScenariosP
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Page 370 and 371: QuickTime Image File FormatNote The
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Page 374 and 375: Defining Media Data LayoutsUsing Qu
Page 376 and 377: Random AccessSeeking With a QuickTi
Page 378 and 379: Metadata HandlingDigital Audio File
Page 380 and 381: Metadata HandlingStill Image File F
Page 382 and 383: Summary of VR World and Node Atom T
Page 394 and 395: Profile Atom GuidelinesProfile Atom
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Page 436 and 437: GlossaryAAC Advanced Audio Coding (
Page 438 and 439: Glossaryfile preview A thumbnail pi
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Page 442 and 443: GlossaryPCM Pulse-code modulation (
Page 444 and 445: Glossarytrack A Movie Toolbox data
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Apple Inc.© 2004, 2012 Apple Inc.A
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