IMFPMediaItem::SetStreamSink method (mfplay.h)

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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 It has been superseded by MediaPlayer and IMFMediaEngine.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.]

Sets a media sink for the media item. A media sink is an object that consumes the data from one or more streams.

Syntax

HRESULT SetStreamSink(
  [in] DWORD    dwStreamIndex,
  [in] IUnknown *pMediaSink
);

Parameters

[in] dwStreamIndex

Zero-based index of a stream on the media source. The media sink will receive the data from this stream.

[in] pMediaSink

IUnknown pointer that specifies the media sink. Pass in one of the following:

A pointer to a stream sink. Every media sink contains one or more stream sinks. Each stream sink receives the data from one stream. The stream sink must expose the IMFStreamSink interface.
A pointer to an activation object that creates the media sink. The activation object must expose the IMFActivate interface. The media item uses the first stream sink on the media sink (that is, the stream sink at index 0).
NULL. If you set pMediaSink to NULL, the default media sink for the stream type is used.

Return value

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

Remarks

By default, the MFPlay player object renders audio streams to the Streaming Audio Renderer (SAR) and video streams to the Enhanced Video Renderer (EVR). You can use the SetStreamSink method to provide a different media sink for an audio or video stream; or to support other stream types besides audio and video. You can also use it to configure the SAR or EVR before they are used.

Call this method before calling IMFPMediaPlayer::SetMediaItem. Calling this method after SetMediaItem has no effect, unless you stop playback and call SetMediaItem again.

To reset the media item to use the default media sink, set pMediaSink to NULL.

Remote Playback Optimizations

If the application is running over Remote Desktop, and you call this method with a non-NULL value for an audio or video stream, MFPlay disables remote playback optimizations. This remark applies only to audio and video streams. It does not apply to streams that contain some other data type, such as text.

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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