The Dolby MP4 streaming demuxer (dlb_mp4demux) is a software implementation of a demuxer of fragmented or unfragmented ISO base media file format (mp4). It supports demuxing of Dolby Digital (AC-3), Dolby Digital Plus (E-AC-3), and Dolby AC-4 audio formats as well as Dolby Vision. It is designed for use on architectures with limited resources.