Specifies an activation object that creates a custom video mixer for the enhanced video renderer (EVR) media sink.
If you are creating the EVR through an activation object, you can use this attribute to set a custom video mixer on the EVR. Use this attribute as follows:
- Call the MFCreateVideoRendererActivate function to create an activation object for the EVR. The function returns a pointer to the IMFActivate interface.
- Set this attribute on the IMFActivate pointer by calling IMFAttributes::SetUnknown. The value of the attribute is a pointer to an activation object implemented by the caller. The caller's activation object must expose the IMFActivate interface.
The GUID constant for this attribute is exported from mfuuid.lib.
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2008 [desktop apps only]