Tomber Su

Yeah I see what you mean. Maybe editing "keyer" in the OBS config to "3" would override it to actually allow RGB. But I'm not sure.

Yeah that's why I suggested editing the config (not sure what file it's in though). Only valid modes are 1 and 2, but it only checks if the number is greater than zero where it decides between RGB and 4:2:2. So setting it manually *might* work.

Mh that's unfortunate but I can't really tell you why that happens. Colin is the main guy for DeckLink stuff so if he can reproduce what you're seeing he might be able to nail it down. With my shuttle I may still be able to figure out the 709/601 issue though.

We've used the Decklink extreme with K/F on a few shows, and it while it renders in RGB, the colorspace is still wonky. Depending on your final destination (hardware), sometimes 601 partial gets you the most accurate colors. Regardless, RIP 444 either way

Yeah I think the colorspace is just never set so blackmagic's SDK defaults to 601. Not sure why RGB is doing so poorly though.

I don't understand the encoding lag at all on 709/RGB. I don't see increased CPU or GPU usage, my hardware is strong enough (i9-7900X + RTX 2080) and it's only 1080p25 (my capture card on other PC doesn't accept 4:4:4 above 1080p30).