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

Media Data Atom TypesPanorama Tracksreserved1Reserved. This field must be 0.reserved2Reserved. This field must be 0.dataRefIndexReserved. This field must be 0.dataThe VR world atom container. The sample description structure is extended to hold this atom container.Panorama TracksNote VR Media is deprecated in the QuickTime file format. The information that follows is intendedto document existing content containing VR Media and should not be used for new development.A movie’s panorama track is a track that contains information about the panoramic nodes in a scene. Themedia type of the panorama track is 'pano'. Each sample in a panorama track corresponds to a single panoramicnode. This sample parallels the corresponding sample in the QTVR track. Panorama tracks do not have a sampledescription (although QuickTime requires that you specify a dummy sample description when you callAddMediaSample to add a sample to a panorama track). The sample itself contains an atom container thatincludes a panorama sample atom and other optional atoms.Panorama Sample Atom StructureA panorama sample atom has an atom type of kQTVRPanoSampleDataAtomType ('pdat'). It describes asingle panorama, including track reference indexes of the scene and hot spot tracks and information aboutthe default viewing angles and the source panoramic image.The structure of a panorama sample atom is defined by the QTVRPanoSampleAtom data type:typedef struct VRPanoSampleAtom {UInt16UInt16UInt32UInt32Float32Float32majorVersion;minorVersion;imageRefTrackIndex;hotSpotRefTrackIndex;minPan;maxPan;2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.289