Some applications need more than one video output. For this scenario, the MontiVision Smart Control provides a slave video window function, making it possible to display the video of a video renderer filter from an external filter graph. This external filter graph comes from another MontiVision Smart Control. The "slave" MV Smart Control contains no filter graph - it is only used to display a video stream. The picture below demonstrates this concept. The "Master MontiVision Smart Control" loads the filter graph and then displays the video stream from video renderer named "Video Renderer", while the "Slave MontiVision Smart Control" only displays the video stream from the video renderer named "Video Renderer 0003".
The IMVSCVideoWindow interface contains the IMVSCVideoWindow::SetVideoRenderer method for purposes of connecting the MV Smart Control with an external video renderer. It requires two parameters, specifying the filter graph manager interface and the name of the video renderer. The IMVSCFilterGraph::FilterGraphManager property from the "Master MontiVision Smart Control" contains the filter graph manager interface.
To connect the "Video Renderer" filter to the "Master MontiVision Smart Control" the IMVSCVideoWindow interface contains the IMVSCVideoWindow::RendererFilter property with the name of the video renderer filter.
For implementation details in the programming language of your
choice look at the FindObject Sample.