IMixerPinConfig::SetBlendingParameter method (mpconfig.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 SetBlendingParameter method sets the blending parameter that defines how a secondary stream is blended with a primary stream.

Syntax

HRESULT SetBlendingParameter(
  [in] DWORD dwBlendingParameter
);

Parameters

[in] dwBlendingParameter

Value between 0 and 255 that indicates the amount of blending between a primary stream and a secondary stream.

Return value

Returns an HRESULT value. Possible values include the following:

Return code	Description
E_UNEXPECTED	Method called on primary stream.
E_INVALIDARG	Value outside of possible range (0 to 255).
S_OK	Success.

Remarks

The value of the dwBlendingParameter parameter must be between 0 and 255, where 0 makes the secondary stream invisible and 255 makes the primary stream invisible in the area that the secondary stream occupies. If no value is set the default is 255.

This method is not intended to be called on the primary stream.

Note Current DirectShow implementation of this interface allows only values of 0 or 255 for the dwBlendingParameter parameter. Any other values are invalid.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	mpconfig.h
Library	Strmiids.lib