If your goal is to use your PC as a receiver to process, record, or mix incoming AV signals, these "freeware" DAWs are the top choices: Yamaha Corporation Firmware and Software - Yamaha - United States
AmCap is a classic, tiny utility that has existed since the Windows XP era. It does one thing: receives video from a capture device. av card receiver software free
If you have a "Receiver" style card that captures video from an external source (like a Camcorder, VHS player, or Game Console), you need "Capture Software." If your goal is to use your PC