I couldn't get my two USB 3.0 capture cards to work together in one of my PCs. Then I tried Wirecast and found out that there wasn't enough USB bandwidth for the two cards, because in Wirecast a warning pops up in that circumstance. I think that this warning is a useful feature that is missing in OBS Studio.
This PC has four physical USB 3.0 ports, though... I have another PC with five physical USB 3.1 ports where these two cards work well together but no one can tell me whether it would support a third USB 3.0 card; even its manufacturer is clueless.
This PC has four physical USB 3.0 ports, though... I have another PC with five physical USB 3.1 ports where these two cards work well together but no one can tell me whether it would support a third USB 3.0 card; even its manufacturer is clueless.