This document specifies the ISO base media file format, which is a general format forming the basis for a number of other more specific file formats. This format contains the timing, structure, and media information for timed sequences of media data, such as audio-visual presentations.th edition 2020-12 Information technology — Coding of audio-visual objects — Part 12: ISO base media file format Technologies de l'information — Codage des objets audiovisuels — Partie？12:？Format？ISO？de？base？pour？les？fichiers？médias Reference number ISO/IEC 14496-12:2020(E) ？ ISO/IEC 2020 ISO/IEC 14496-12:2020(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO/IEC 2020