The following method for C++ shows how to use the ltmmProcessors object from the ltmmPlayControl object to register a 3rd-party video processor.
void PlayerEnableCustomVideoProcessor(IltmmPlay *pPlay) { IltmmProcessors *pVideoProcessors = NULL; // try to get the video processors collection object HRESULT hr = pPlay->get_VideoProcessors(&pVideoProcessors); if (SUCCEEDED(hr) && NULL != pVideoProcessors) { // Register the external filter by class id pVideoProcessors->RegisterExternalProcessor(L"{AFF289A6-ABF1-4d68-9A51-634BF7077CFC}", VARIANT_TRUE); pVideoProcessors->Release(); } }