I have the same problem. At first when the screen went frozen, I simply restarted the OBS. Recently, I realized that when the game capture screen freezes, right click - property - change ANY option you see and then click CANCEL unfreezes the game screen. No reconnecting capture card, no restarting OBS. Just make a change in capture card property and "Cancel"ing it unfroze the screen. According to this experience, I humbly suggest the problem is in OBS studio program, because I didn't restart my system, didn't reconnect any physical cables, and didn't even turned off the OBS studio.(Not sure cause I have very limited knowledge on computer engineering, so I humbly suggest...)
With my grateful mind so far, I hope the OBS dev team see this thread and let us Avermedia users know what the problem is, resolve the problem, and thus, make OBS even better. I'm always thanking you guys for making streaming much easier for me. Thank you.
P.S. I hope to ensure that my current status is not outdated. I already tried that link
@Zachrulez posted, and it didn't work because my RECentral is already updated. Of course my OBS studio is also up to date and I'm also sure all the drivers I have are up to date, and my devices are powerful enough to stream.
A short excuse : English is not my first language. I think there can be some part that English users can't understand about my words, mostly because of the lack of my knowledge. That is why I wrote comments that long. To say my situation clearly.
I hope this problem will get fixed soon.