Been using NCH "Debut" for years as a screen capture device and works great for that. Webcam capture? Yes, good. Webcam capture with effects: green screen: image in background? Works Great. Webcam capture with effects: green screen: video in background? Nope. Some error in processing a video for green screen background use where FPS gets adjusted somehow way to fast. Have tried various experiments to try to find possible case, cure but appears to be NCH "processing video" that is somehow wrong. I have contacted NCH support and for a while they did respond but then silent. ???? So image backgrounds, green screen: fine. Video in green screen background: nope.