How to Put Essence into an MXF File
The system item provides services for each content package through metadata elements and other data such as control information. Picture and sound items carry the primary video and audio elements that are often routed to specialist storage or processing equipment. The data item is used to carry data-centric elements such as subtitles and teletext data and is frequently created, processed, and stored on computer media. The compound item essentially carries mixed essence types that are intrinsically interleaved.