There's really nothing I can do about it. This is an AMD driver issue at this point that's specific to idTech games, I had nvidia users test this out and it was working fine. I have an AMD and I tested this myself -- when it crashes it's always a crash in the driver DLL. So I really don't think there's anything I can do at this point to fix it. I tried a number of workarounds in code, but the fast GL capture just cannot be used with those drivers right now. The slow capture worked, but it lagged the game way too much just because the game was so demanding. It really needs the fast capture capability.
Specifically, the GL extensions that cause the crash to occur are the opengl and directx interop extensions. AMD drivers are just crashing whenever those functions are being called, and the strangest thing about it is that it works fine for any GL game that's not an idTech game. I'm almost totally convinced now that AMD is using some sort of driver optimization specific to idTech that isn't compatible with the interop extension, and thus causing a crash.