Microsoft DirectX 9.0


This topic applies to Windows XP only.

The put_DecimateInput method specifies whether the Video Mixing Renderer (VMR) will decimate the video (that is, reduce the native video size) before processing it.

This method is currently not supported.


HRESULT put_DecimateInput(
    VARIANT_BOOL bDecimate



Specifies whether to enable or disable video decimation. Use one of the following values.

Value Description
VARIANT_TRUE Enable video decimation.
VARIANT_FALSE Disable video decimation.

Return Value

If the method succeeds, it returns S_OK. If it fails, it returns an error code.


This property should be set to true when the native video stream is HDTV but the system monitor is set to a lower resolution. This prevents the VMR from doing unnecessary work by processing the video at high resolution and then shrinking it.

See Also