A 100-lines code snippet which illustrates how a bitmap is overlaid over displayed video with Video Mixing Renderer 9 Filter using IVMRMixerBitmap9 interface. A video clip is played (default is Windows clock.avi, but you can replace it with your longer one to see overlay is really in a loop). http://code.assembla.com/…/VmrMixerBitmapSample01/… VMR9AlphaBitmap AlphaBitmap; ZeroMemory(&AlphaBitmap, sizeof AlphaBitmap);…