Contains a pointer to the callback interface for the Media Engine.
IMFMediaEngineNotify* stored as IUnknown*
To get this attribute, call IMFAttributes::GetUnknown.
To set this attribute, call IMFAttributes::SetUnknown.
The value of this attribute is a pointer to the IMFMediaEngineNotify interface, implemented by the application.
This attribute is used with the IMFMediaEngineClassFactory::CreateInstance method to initialize the Media Engine. The attribute is required.
Minimum supported client
|Windows 8 [desktop apps | Windows Store apps]|
Minimum supported server
|Windows Server 2012 [desktop apps | Windows Store apps]|