The 3GPP consortium has defined a standard for text streaming, independent of any scene description such as SMIL, SVG or BIFS: 3GPP Timed Text. MP4Box supports this standard and uses its own textual format to describe a streaming text session. MP4BOX HELP A rather complete description of MP4Box functionalities and various switches. MPEG-4 SYSTEMS Documentation of GPAC specific handling of MPEG-4 s