I am looking to use my Raspberry Pi as a video source for my Amateur Television transmitter. It is perfect for playing video.
The one difficulty is that I need to overlay my callsign (VK3PB) on the video as it is playing (this is a legal requirement). In Windows I used a program called Blackhat notes which allows you to put text or graphics in a small box and have this always on top of whatever you are doing, including playing a video.
Is anyone aware of a similar program that could serve my needs that will run on the Raspberry Pi and display my callsign or a graphic in a box on top of the video?