nf-mfreadwrite-imfsourcereader-getstreamselection.md

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NF:mfreadwrite.IMFSourceReader.GetStreamSelection	IMFSourceReader::GetStreamSelection (mfreadwrite.h)	Queries whether a stream is selected.	GetStreamSelection GetStreamSelection method [Media Foundation] GetStreamSelection method [Media Foundation] IMFSourceReader interface IMFSourceReader interface [Media Foundation] GetStreamSelection method IMFSourceReader.GetStreamSelection IMFSourceReader::GetStreamSelection MF_SOURCE_READER_FIRST_AUDIO_STREAM MF_SOURCE_READER_FIRST_VIDEO_STREAM mf.imfsourcereader_getstreamselection mfreadwrite/IMFSourceReader::GetStreamSelection	mf\imfsourcereader_getstreamselection.htm	mf	40301426-4bf2-442c-91b5-9916d1314617	12/05/2018	GetStreamSelection, GetStreamSelection method [Media Foundation], GetStreamSelection method [Media Foundation],IMFSourceReader interface, IMFSourceReader interface [Media Foundation],GetStreamSelection method, IMFSourceReader.GetStreamSelection, IMFSourceReader::GetStreamSelection, MF_SOURCE_READER_FIRST_AUDIO_STREAM, MF_SOURCE_READER_FIRST_VIDEO_STREAM, mf.imfsourcereader_getstreamselection, mfreadwrite/IMFSourceReader::GetStreamSelection	mfreadwrite.h		Windows	Windows 7, Windows Vista and Platform Update Supplement for Windows Vista [desktop apps \| UWP apps]	Windows Server 2008 R2 [desktop apps \| UWP apps]													Windows			19H1	IMFSourceReader::GetStreamSelection mfreadwrite/IMFSourceReader::GetStreamSelection	c++	APIRef kbSyntax	COM	mfreadwrite.h	IMFSourceReader.GetStreamSelection

IMFSourceReader::GetStreamSelection

-description

Queries whether a stream is selected.

-parameters

-param dwStreamIndex [in]

The stream to query. The value can be any of the following.

Value	Meaning
0–0xFFFFFFFB	The zero-based index of a stream.
MF_SOURCE_READER_FIRST_VIDEO_STREAM 0xFFFFFFFC	The first video stream.
MF_SOURCE_READER_FIRST_AUDIO_STREAM 0xFFFFFFFD	The first audio stream.

-param pfSelected [out]

Receives TRUE if the stream is selected and will generate data. Receives FALSE if the stream is not selected and will not generate data.

-returns

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

-remarks

This interface is available on Windows Vista if Platform Update Supplement for Windows Vista is installed.

-see-also

IMFSourceReader

Source Reader