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MPEG-4 Book, The by Touradj Ebrahimi, Fernando Pereira

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D.7. Main 2D Profile

The Main 2D scene graph profile includes basic 2D composition, 2D texturing, local interaction, local animation, BIFS updates, and access to Web links and subscenes, in addition to audio and visual elements. It also introduces tools such as back channel (ServerCommand), VoD features (MediaControl, MediaSensor) and Flextime nodes (TemporalGroup, TemporalTransform) for advanced, flexible synchronization.

Level 1

The restrictions listed in Table D.12 apply for the Main 2D scene graph profile at Level 1 [N4408]:

The maximum number of nodes that is allowed in a scene compliant with Main 2D@L1 is 8,191, including all instances of these nodes through the DEF/USE mechanism.

Where addChildren and removeChildren fields are not supported, ...

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