ALpha Channel Image Overlay
I was attempting to use the alpha channel using transport part of image to show thru a video loop. Is only one video zone and image overlay supported at one time. I had a ticker, three image zones, clock and date on the screen. seems every time the clock, video or ticker updated, all the items on the screen went blank. then came back I had to abandon the alpha channel idea and use just four image zones to encase the video with the images to look same a alpha channel.