LEAD MPEG2 Transport Demultiplexer

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The LEAD MPEG2 Transport Demultiplexer is a DirectShow filter that can parse the following types of streams:

1.       MPEG-2 Transport specified in ISO/IEC 13818-1
2.       MPEG-2 Program specified in ISO/IEC 13818-1
3.       MPEG-1 System specified in ISO/IEC 11172-1
4.       Elementary stream data (also known as raw video or raw audio data)

The first two formats are multiplexed formats, and they can contain video, audio and private data streams. The video compression can be MPEG1 (ISO/IEC 11172-2), MPEG2 (ISO/IEC 13818-1), MPEG4 (ISO/IEC 14496-2) or H.264 (ISO/IEC 14496-10). The audio compression can be MPEG1 (ISO/IEC 11172-3), AC3, LPCM or AAC.

The private data can be retrieved using the ILMMpgDmxCallback interface. The filter will create private data pins, but it is not necessary to render these pins in order to programmatically retrieve the private data packets. The filter also provides the ILMKlvParser interface, which can be used to parse KLV private data conforming to SMPTE 336M-2001. The demultiplexer works in pull mode and will connect to source filters that expose the IAsyncReader interface.

Under Windows 7, Media Player uses Windows Media Foundation modules to play MPEG2 Transport files. By default, Media Player will not use LEAD MPEG2 Transport Demultiplexer to play MPEG-2 Transport files. For troubleshooting in Windows 7, see Playing Media Player Files in Windows 7 .

Technical details for the demultiplexer are provided in the following table:

Filter Interfaces	ILMMpgDmx ILMKlvParser
Interface ID	IID_ILMMpgDmx IID_ILMKlvParser
Input Media Types	Type: MEDIATYPE_Stream Subtypes: MEDIASUBTYPE_NULL MEDIASUBTYPE_MPEG2_PROGRAM MEDIASUBTYPE_MPEG1Video MEDIASUBTYPE_MPEG1System MEDIASUBTYPE_UDPStream MEDIASUBTYPE_MPEG1Audio MEDIASUBTYPE_MPEG2_TRANSPORT
Output Media Types	Depends on the type of data being parsed. The most common output media types are: Type: MEDIATYPE_Video Subtypes: MEDIASUBTYPE_MPEG2_VIDEO MEDIASUBTYPE_L264 Type: MEDIATYPE_Audio Subtype: MEDIASUBTYPE_MPEG1AudioPayload MEDIASUBTYPE_MPEGLAYER3 MEDIASUBTYPE_DOLBY_AC3 MEDIASUBTYPE_DVD_LPCM_AUDIO MEDIASUBTYPE_AAC Type: MEDIATYPE_METADATA Subtypes: MEDIASUBTYPE_KLVA MEDIASUBTYPE_PrivateData
Filter CLSID	CLSID_LMMpgDmxT
Property Page CLSID	N/A
Executable	LMMpgDmxT.dll, DSKernel2.dll
Filter category	CLSID_LegacyAmFilterCategory
Header	ILMMpgDmxT.h ILMMpgDmxCommon.h

Platforms

Win32, x64, Mobile