Using capture cards with go live

Hello, I think it would be really convenient to be able to use capture cards with go live so that you can easily stream games to your favorite server or friends. And obs does not let you use audio and vlc has issues with video quality and audio desync over time. (yes and its set to 0ms) So I think it would be very nice if i could use capture devices as an option in go live, it would make go live even better.