Programming With QuickTime VR

Object Tracks

A movie's object track is a track that contains information about the object nodes in a scene. The media type of the object track is 'obje' . Each sample in an object track corresponds to a single object node in the scene. The samples of the object track contain information describing the object images stored in the object image track. These object information samples parallel the corresponding node samples in the QTVR track and are equal in time and duration to a particular object node's image samples in the object's image track as well as the object node's hot spot samples in the object's hot spot track.

Object tracks do not have a sample description (although QuickTime requires that you specify a dummy sample description when you call AddMediaSample to add a sample to an object track). The sample itself is an atom container that contains a single object sample atom and other optional atoms.

Object Sample Atom Structure

Track References for Object Tracks