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.AfterDawn.com – Demux 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.AfterDawn.com – Guides - Introduction to Haali Media Splitter
Notable file splitters Microsoft AVI splitter - Part of Microsoft Windows.Windows Media Developer Center - AVI Splitter FilterWindows Media Developer Center - MPEG-2 SplitterWindows Media Developer Center - MPEG-2 Demultiplexer Haali Media Splitter - demultiplexes MP4 (MPEG-4), M2TS (MPEG transport stream) and MKV (Matroska) files.Haali Media Splitter FLV Splitter - demultiplexes Flash video files.SourceForge.net - FLV Splitter 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.FFmpeg General Documentation - File Formats, Retrieved 2009-09-02 e.g. used in MPlayer and GOM Player libvlc (part of VideoLAN project and VLC Media Player) - demultiplexes many formats e.g. MPEG transport stream, MPEG program stream, MP4, MOV, 3GP, Ogg, OGM, ASF, WMV, WMA, MKV, FLV, etc.VideoLAN Project VLC playback Features, Retrieved 2009-09-02 Nero Splitter Ogg DirectShow FiltersXiph.org Directshow Filters for Ogg Vorbis, Speex, Theora and FLAC, Retrieved 2009-09-02 - demultiplexes Ogg container tsMuxeR, using the Demux output option MP4Box, command line MP4 multiplexer/demultiplexer with GUIs like My MP4Box
Playback issues Playback difficulties (such as no playback, no audio, or no video) may result from several or legacy file splitters for a particular file format being installed on an operating system. This causes decoder-to-file-splitter mismatch resulting in playback failure on media players.
See also Container format Multiplexer Multimedia framework File spanning
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