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

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Media Data Atom TypesSprite Track Media FormatImportant Some sprite track property atoms were added in QuickTime 4. In particular, you must set thekSpriteTrackPropertyHasActions track property in order for your sprite actions to be executed.Sprite Track Property AtomsThe following constants represent atom types for sprite track properties. These atoms are applied to the wholetrack, not just to a single sample.Constant DescriptionskSpriteTrackPropertyHasActionsYou must add an atom of this type with its leaf data set to true if you want the movie controller toexecute the actions in your sprite track’s media. The atom’s leaf data is of type Boolean. The defaultvalue is false, so it is very important to add an atom of this type if you want interactivity to take place.kSpriteTrackPropertyQTIdleEventsFrequencyYou must add an atom of this type if you want the sprites in your sprite track to receive kQTEventIdleQuickTime events. The atom’s leaf data is of type UInt32. The value is the minimum number of ticksthat must pass before the next QTIdle event is sent. Each tick is 1/60th of one second. To specify “Idleas fast as possible,” set the value to 0. The default value is kNoQTIdleEvents, which means don’t sendany idle events.It is possible that for small idle event frequencies, the movie will not be able to keep up, in which caseidle events will be sent as fast as possible.Since sending idle events takes up some time, it is best to specify the largest frequency that producesthe results that you desire, or kNoQTIdleEvents if you do not need them.kSpriteTrackPropertyVisibleYou can cause the entire sprite track to be invisible by setting the value of this Boolean property tofalse. This is useful for using a sprite track as a hidden button track—for example, placing an invisiblesprite track over a video track would allow the characters in the video to be clickable. The default valueis visible (true).kSpriteTrackPropertyScaleSpritesToScaleWorldYou can cause each sprite to be rescaled when the sprite track is resized by setting the value of thisBoolean property to true. Setting this property can improve the drawing performance and quality ofa scaled sprite track. This is particularly useful for sprite images compressed with codecs that areresolution-independent, such as the Curve codec. The default value for this property is false.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.214
Media Data Atom TypesSprite Media Atom and Data TypesSprite Media Atom and Data TypesThe following constants represent atom types for sprite media:enum {kSpriteAtomTypekSpriteImagesContainerAtomTypekSpriteImageAtomTypekSpriteImageDataAtomTypekSpriteImageDataRefAtomTypekSpriteImageDataRefTypeAtomTypekSpriteImageGroupIDAtomTypekSpriteImageRegistrationAtomType= 'sprt',= 'imct',= 'imag',= 'imda',= 'imre',= 'imrt',= 'imgr',= 'imrg',kSpriteImageDefaultImageIndexAtomType ='defi',kSpriteSharedDataAtomTypekSpriteNameAtomTypekSpriteImageNameAtomTypekSpriteUsesImageIDsAtomTypekSpriteBehaviorsAtomTypekSpriteImageBehaviorAtomTypekSpriteCursorBehaviorAtomType= 'dflt',= 'name',= 'name',= 'uses',= 'beha',= 'imag',= 'crsr',kSpriteStatusStringsBehaviorAtomType = 'sstr',kSpriteVariablesContainerAtomTypekSpriteStringVariableAtomType= 'vars',= 'strv',kSpriteFloatingPointVariableAtomType = 'flov'kSpriteSharedDataAtomTypekSpriteURLLinkAtomType= 'dflt',= 'url 'kSpritePropertyMatrix = 1kSpritePropertyVisible = 4kSpritePropertyLayer = 5kSpritePropertyGraphicsMode = 6kSpritePropertyImageIndex = 100kSpritePropertyBackgroundColor = 101kSpritePropertyOffscreenBitDepth = 102kSpritePropertySampleFormat = 103};2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.215
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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 TypesPacketization
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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 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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