Media Tracks Sample Clauses

Media Tracks. ‌ Each track of media content (i.e. audio, video, subtitles, etc.) is described by a Track Box (‘trak’) in accordance with [ISO], with the addition of the following constraints: • Each Track Box SHALL contain a Track Header Box (‘tkhd’), as defined in Section 2.3.5. • The Media Box (‘mdia’) in a ‘trak’ SHALL contain a Media Header Box (‘mdhd’), as defined in Section 2.3.6. • The Media Box in a ‘trak’ SHALL contain a Handler Reference Box (‘hdlr’), as defined in Section 2.3.7. • The Media Information Box SHALL contain a header box corresponding to the track’s media type, as follows:  Video tracks: Video Media Header Box (‘vmhd’), as defined in Section 2.3.8.  Audio tracks: Sound Media Header Box (‘smhd’), as defined in Section 2.3.9.