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Intro

Multimedia scene description

A scene description is a language describing animations, interactivity, 2D and 3D shapes, audio and video relationship in a presentation. GPAC supports a variety of scene description languages:

  • MPEG-4 BIFS, in its binary form, text form and XML form
  • Web3D VRML97 and X3D
  • SVG 1.2 Tiny profile
  • MPEG-4 LASeR
  • A subset of SWF (Adobe Flash)

MP4Box supports encoding of BIFS and LASeR, as well as various conversions operations. A detailed list of supported operations is provided here.

Rendering is supported in GPAC through the Compositor filter.

For MPEG-4 Systems scene coding and media packaging, GPAC relies on standard MPEG-4 descriptions but defines its own extensions for media multiplexing, as well as for some BIFS commands. You may also have a look at the tips and tricks page.