About this documentation

This documentation is written for a system designer to develop a product that can properly multiplex Dolby AC-4 bitstreams into a fragmented mp4 file or audio-only elementary stream segments.

library_booksNote: This documentation covers only delivering Dolby AC-4 bitstreams via HLS. For a full description of HLS, see HTTP Live Streaming 2nd Edition.
library_booksNote: This documentation covers only delivering Dolby AC-4 content within the HLS compliant ISO base media file format. For a full description of HLS, see HTTP Live Streaming 2nd Edition.

This documentation provides information regarding:

  • Signaling of Dolby AC-4 audio streams within the HLS playlist file
  • Storage of Dolby AC-4 bitstreams within ISO base media file format files
  • Storage of Dolby AC-4 bitstreams within HLS compliant audio-only elementary stream segments

In addition, the following information is covered:

  • The data required to identify a Dolby AC-4 bitstream within an ISO base media file format file and a playlist file
  • The steps required to properly packetize a Dolby AC-4 bitstream for multiplexing and storage in an ISO base media file format file
  • The buffering consideration for demultiplexing a Dolby AC-4 bitstream from an ISO base media file format file