Media Presentation Description

An MPD can be used to describe media presentations with one or multiple Dolby AC-4 bitstreams.

Although the syntax of the MPD is capable of using common XML elements to describe almost any media format, the encoding type and the configuration of a Dolby AC-4 bitstream that is part of a content presentation constrain the parameter values of some of these elements.

The MPD supports these scenarios:

  • Media presentations that consist of a single Dolby AC-4 bitstream

  • Media presentations that consist of multiple full Dolby AC-4 bitstreams, with each bitstream stored in a separate MP4 file or segment file

    library_booksNote: The scenario where two audio services (one main and one associated) that are stored in separate files and are intended to be decoded and then mixed together is not supported.