even if a capture card could, stream platforms don't support ultra wide as I understand but any 4K capture card should be able to adjust resolution to match. I think your best bet is pretending to the capture card your capturing at 4K & streaming 4K with barsHi,
Is there anyway to stream/record at this resolution?
I have an ultra wide screen and a few of the capture cards i have tried including Razer Ripsaw HD just cant cope with it at all, doesn't even show a signal.