Demultiplexer (media file)
type of software

A demultiplexer for digital media files, or media demultiplexer, also called a file splitter by laymen or consumer software providers, is software that demultiplexes individual elementary streams of a media file, e.g., audio, video, or subtitles and sends them to their respective decoders for actual decoding. Media demultiplexers are not decoders themselves, but are format container handlers that separate media streams from a (container) file and supply them to their respective audio, video, or subtitles decoders.
Notable file splitters
Microsoft AVI splitter - Part of Microsoft Windows.
Haali Media Splitter - demultiplexes MP4 (MPEG-4), M2TS (MPEG transport stream) and MKV (Matroska) files.
FLV Splitter - demultiplexes Flash video files.
Gabest splitter (part of Media Player Classic) - demultiplexes e.g. 3GP, MP4
LAV Splitter - part of the LAV Filters project (open source DirectShow media splitter and decoders).
libavformat (part of the FFmpeg project) - demultiplexes many formats e.g. 3GP, ASF, AVI, FLV, SWF, M2TS, MKV, MOV, MP4, MPG, NSV, NUT, Ogg, RM, AIFF, AU, WAV, etc.
e.g.
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This entry incorporates text from “Demultiplexer (media file)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.