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MPEG-2 Demultiplexer Media Types

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Microsoft DirectShow 9.0

MPEG-2 Demultiplexer Media Types

The MPEG-2 Demultiplexer filter recognizes the following media types.

Input Types

The major type is always MEDIATYPE_Stream. The subtype can be any of the following:

GUID Description
KSDATAFORMAT_SUBTYPE_BDA_MPEG2_TRANSPORT Transport stream from a Broadcast Driver Architecture (BDA) device filter. The MPEG-2 demultiplexer treats this subtype identically to MEDIASUBTYPE_MPEG2_TRANSPORT.
MEDIASUBTYPE_MPEG2_PROGRAM Program stream
MEDIASUBTYPE_MPEG2_TRANSPORT Transport stream (TS), with 188-byte packets
MEDIASUBTYPE_MPEG2_TRANSPORT_STRIDE Transport stream with "strided" packets. This subtype indicates that the TS packets may be padded with extra bytes. For more information, see MPEG2_TRANSPORT_STRIDE.

For strided transport packets (MEDIASUBTYPE_MPEG2_TRANSPORT_STRIDE), each media sample must contain an integral number of transport packets, as described in MPEG2_TRANSPORT_STRIDE. For all other input types, there are no restrictions on sample boundaries; individual packets can span sample boundaries.

Output Types

The MPEG-2 Demultiplexer does not validate output types; the downstream filter is responsibe for parsing the data it receives from the demultiplexer. However, the following types are commonly accepted by downstream filters as output from the demultiplexer:

MPEG-2 Sections

Major Type MEDIATYPE_MPEG2_SECTIONS
Subtype MEDIASUBTYPE_ATSC_SI: ATSC Service Information

MEDIASUBTYPE_DVB_SI: DVB Service Information

MEDIASUBTYPE_MPEG2DATA: Used by the MPEG-2 Sections and Tables filter.
Format Type None

MPEG-2 Video

Major type MEDIATYPE_Video
Subtype MEDIASUBTYPE_MPEG2_VIDEO
Format Type FORMAT_MPEG2Video
Format Structure MPEG2VIDEOINFO

MPEG-2 Audio

Major type MEDIATYPE_Audio
Subtype MEDIASUBTYPE_MPEG2_AUDIO
Format Type FORMAT_WaveFormatEx
Format Structure WAVEFORMATEX

Requirements

  Header: Dshow.h. Also, some GUIDs are defined in Bdamedia.h

See Also