Extensible MPEG-4 Textual Format


The Extensible MPEG-4 Textual Format is a high-level, XML-based file format for storing MPEG-4 data in a way suitable for further editing. In contrast, the more common MPEG-4 Part 14 format is less flexible and used for distributing finished content.
It was developed by MPEG and defined in MPEG-4 Part 11 Scene description and application engine.
XMT provides a textual representation of the MPEG-4 binary composition technology, based on XML. The XMT framework accommodates substantial portions of SMIL, W3C Scalable Vector Graphics and X3D. Such a representation can be directly played back by a SMIL or VRML player, but can also be binarised to become a native MPEG-4 representation that can be played by an MPEG-4 player. Another bridge has been created with BiM.