IMFPMediaItem::GetStreamSelection method (mfplay.h)

發行項
12/05/2018

[The feature associated with this page, MFPlay, is a legacy feature. It has been superseded by MediaPlayer and IMFMediaEngine. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer and IMFMediaEngine instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Queries whether a stream is selected to play.

Syntax

HRESULT GetStreamSelection(
  [in]  DWORD dwStreamIndex,
  [out] BOOL  *pfEnabled
);

Parameters

[in] dwStreamIndex

Zero-based index of the stream. To get the number of streams, call IMFPMediaItem::GetNumberOfStreams.

[out] pfEnabled

Receives a Boolean value.

Value	Meaning
TRUE	The stream is selected. During playback, this stream will play.
FALSE	The stream is not selected. During playback, this stream will not play.

Return value

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

Remarks

To select or deselect a stream, call IMFPMediaItem::SetStreamSelection.

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
Target Platform	Windows
Header	mfplay.h

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