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

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Media Data Atom TypesQuickTime VR File FormatSingle-Node Object MoviesFigure 4-24 (page 286) illustrates the basic structure of a single-node object movie. As you can see, every objectmovie contains at least three tracks: a QTVR track, an object track, and an object image track.Figure 4-24The structure of a single-node object movie fileQTVR trackObject trackObject image trackFor a single-node object movie, the QTVR track contains just one sample. There is a corresponding sample inthe object track, whose time and duration are the same as the time and duration of the sample in the QTVRtrack. The time base of the movie is used to locate the proper video samples in the object image track.For an object movie, the frame corresponding to the first row and column in the object image array is locatedat the same time as the corresponding QTVR and object track samples. The total duration of all the videosamples is the same as the duration of the corresponding QTVR sample and the object sample.In addition to these three required tracks, an object movie can also contain a hot spot image track and anynumber of standard QuickTime tracks (such as video, sound, and text tracks). A hot spot image track for anobject is a QuickTime video track that contains images of colored regions delineating the hot spots; an imagein the hot spot image track must be synchronized to match the appropriate image in the object image track.A hot spot image track should be 8 bits deep and can be compressed with any lossless compressor (includingtemporal compressors). This is also true of panoramas.Note To assign a single fixed-position hot spot to all views of an object, you should create a hotspot image track that consists of a single video frame whose duration is the entire node time.To play a time-based track with the object movie, you must synchronize the sample data of that track to thestart and stop times of a view in the object image track. For example, to play a different sound with each viewof an object, you might store a sound track in the movie file with each set of sound samples synchronized toplay at the same time as the corresponding object’s view image. (This technique also works for video samples.)Another way to add sound or video is simply to play a sound or video track during the object’s view animation;to do this, you need to add an active track to the object that is equal in duration to the object’s row duration.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.286
Media Data Atom TypesQuickTime VR File FormatImportant In a QuickTime VR movie file, the panorama image tracks and panorama hot spot tracks mustbe disabled. For an object, the object image tracks must be enabled and the object hot spot tracks mustbe disabled.Multinode MoviesA multinode QuickTime VR movie can contain any number of object and panoramic nodes. Figure 4-25 (page287) illustrates the structure of a QuickTime VR movie that contains five nodes (in this case, three panoramicnodes and two object nodes).Figure 4-25The structure of a multinode movie fileQTVR track1st node 2nd node 3rd node 4th node 5th nodePanorama trackPanorama image trackPanorama low-resimage trackPanorama hot spotimage trackObject trackObject image trackObject hot spot track2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.287
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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 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 TypesWired Action G
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Media Data Atom TypesFlash MediakAc
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Page 316 and 317: Basic Data TypesThis chapter descri
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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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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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