Demultiplexer (dmux)

Demultiplexers take transmissions and divide them into their designated components. They perform the inverse function of multiplexers. Generally speaking, multiplexers are devices or programs that consolidate multiple inputs into a single output. For example, if a video file needs stereo audio added to it, it can be multiplexed (muxed) with the right and left audio channels. Inversely, if audio needs to be extracted from a video file, demultiplexing (demuxing) the source file would output separate audio and video files.