True False gtk-orientation-landscape 3 True False gtk-orientation-reverse-landscape 3 False GStreamer video test video-display True False True False 8 8 8 viewport 1280 720 True True False True True False True 0 True False 8 8 8 8 1 True False 8 True bottom center Input 1 True True True image1 True False True 0 Input 2 True True True image2 True False True 1 gtk-quit True True True True True False True 2 False True 1