IWMVideoForceKeyFrame::SetKeyFrame Method

發行項
04/12/2010

Specifies that the current frame will be encoded as a key frame.

Syntax

HRESULT SetKeyFrame();

Parameters

This method has no parameters.

Return Value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.

Remarks

To force the encoder to make the current frame a key frame, call this method before calling IMediaObject::ProcessOutput or IMFTransform::ProcessOutput.

Each call to this method applies to a single frame. After processing this frame, the encoder resumes automatically assigning key frames (bounded by the maximum key frame distance).

Requirements

Minimum supported client	Windows XP
Minimum supported server	Windows Server 2003
Header	Wmcodecdsp.h

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