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IDecimateVideoImage interface (strmif.h)

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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

The IDecimateVideoImage interface specifies decimation on a decoder filter. The term decimation refers to scaling the video output down to a size smaller than the native size of the video.

Applications must not call methods on this interface. The Overlay Mixer filter uses this interface to decimate video at the video decoder.

Decoder filters that can decimate their video output should support this interface.

Inheritance

The IDecimateVideoImage interface inherits from the IUnknown interface. IDecimateVideoImage also has these types of members:

Methods

The IDecimateVideoImage interface has these methods.

 
IDecimateVideoImage::ResetDecimationImageSize

The ResetDecimationImageSize method specifies that the decoder should no longer decimate its output image.
IDecimateVideoImage::SetDecimationImageSize

The SetDecimationImageSize method specifies the dimensions to which the decoder should decimate its output image.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header strmif.h (include Dshow.h)