I have an analog camera feed (NTSC or PAL) and I want to overlay some interactive menus and graphics on it. It will be displayed on an HDMI monitor, so there be a converter somewhere in the mix. I've ordered a small board with a MAX7456 on it that overlays text on an analog video signal, but I want to do a little more than that. I don't know what to look for. I considered using RPI with a USB video capture dongle but the RPI is quite slow to boot for my application. Is there an inexpensive FPGA-based devboard meant for tinkering with video signals? Or some solution that I don't know enough to ask about?