So I recently bought a GV-USB2 for streaming, using OBS. I think I managed to install the drivers and everything properly. But every time I start stream, the game footage doesn't show until I change the video standard to PAL M, switch the input off and on, and change it back to PAL B (I'm UK based). Once I get it showing, the footage works until I stop stream.

Has anyone had this happen before, and do you know how I might fix it? I'd rather not use anything like Amarec if I can get away with it, and just stream straight into OBS.