MPEG-4 Demultiplexer Filter (Compact 2013)

3/26/2014

The MPEG4 Demultiplexer filter is part of the process for streaming MPEG-4 content. This is a pull mode filter that requests data from an upstream buffering filter and pushes the demultiplexed streams to down-level decoders. This filter parses MPEG-4 presentation streams for local file playback and streaming over HTTP. There is one input pin and one or more output pins depending on the number of streaming tracks present in the media. For example, in addition to the video output pin, there may be additional output pins for multiple audio tracks.

The following table shows the filter properties.

Filter property	Description
Filter Interfaces	IBaseFilter Interface
Input Pin Media Types	MEDIATYPE_Stream_Buffered For more information, see DirectShow Media Types.
Input Pin Media Subtypes	MEDIASUBTYPE_MP4 MEDIASUBTYPE_M4V MEDIASUBTYPE_M4A MEDIASUBTYPE_MP4V
Input Pin Interfaces	IPin Interface
Output Pin Media Types	MEDIATYPE_Video, MEDIATYPE_Audio
Output Pin Media Subtypes	MEDIASUBTYPE_MPEG_ADTS_AAC MEDIASUBTYPE_DOLBY_AC3_SPDIF MEDIASUBTYPE_h264 MEDIASUBTYPE_MP4V
Output Pin Interfaces	IPin Interface, IMediaSeeking
Filter CLSID	CLSID_MP4Demux
SYSGEN	SYSGEN_DSHOW_MP4DEMUX
Executable	Quartz.dll
Merit	MERIT_NORMAL + 1 For more information, see Merit.

Remarks

The MPEG-4 Demultiplexer filter supports the following audio and video codecs:

Container	Video Codecs	Audio Codecs
MP4	MPEG-4 Part 2 MPEG-4 Part 10 (H.264 or AVC)	AC3 AAC

• For AC3 audio, WAVEFORMATEX.wFormatTag is not applicable. For other formats, refer to DirectShow Media Types.

See Also

Reference

Supported DirectShow Filters