Reddit mentions of Blackmagic Design Intensity Pro 4K Capture & Playback Input/Output Card, Ultra HD at 30fps and 1080p at 60fps

uh, there's a 4K capture card that costs $10 more than that thing. Price is a bit steep for just 1080p.

I use the https://www.amazon.com/Blackmagic-Design-Intensity-Capture-Playback/dp/B00U3QNP7Q/ref=sr_1_1?s=electronics&ie=UTF8&qid=1504671028&sr=1-1&keywords=Blackmagic+Design+Intensity+Pro+4K

Blackmagic Design Intensity Pro 4K

The reviews on amazon are a little misleading because it works fine now with all the updates.

these are the OBS studio settings I use

http://i.grab.la/07906-3321cb82-5318-4a0f-909d-1b55ab04f9ac.png

when I first set it up I was trying to use video capture device to find the blackmagic card, and it would find it BUT it was just a black screen so on OBS I switched it to what you see in the screen shot where it shows you it as a blackmagic device.

http://i.grab.la/07906-2f1e6b46-eed8-44a0-8bca-22d3f983dac3.png

I just use the auto settings so far they work fine.

these are my other OBS studio settings

http://i.grab.la/07906-30ff4b98-7011-4abe-ab60-e14e8bdd491c.png

http://i.grab.la/07906-76ff4810-45ea-4892-bf37-cd5674bddaa4.png

One other tip since its capturing the screen though the HDMI in the menus there is an option to turn off the UI on the place where you are capturing it.

Another tip : I noticed shutter speed doesn't matter so you can bring it up to where you get really nice ISOs you can play with the settings but I have noticed shutter speed doesn't matter while streaming though the HDMI, so in a some what dark setting I was able to push the exposure with out having any real effect on the videos look in terms of shutter speed.

One last tip : you can use any of the color modes while streaming and it will broadcast that color mode so you can set it to look the best since you probably wont be grading the footage you can do some minor color corrections in screen, and it will broadcast that.

you may already know all that but just throwing it out there for anyone trying to stream using a GH5.

Not sure, but the Black Magic Intensity Pro 4k might be what you're looking for.

https://www.amazon.com/gp/aw/d/B00U3QNP7Q/ref=mp_s_a_1_1?ie=UTF8&qid=1481999259&sr=8-1&pi=SX200_QL40&keywords=blackmagic+intensity+pro+4k&dpPl=1&dpID=51EUQWGbAuL&ref=plSrch

I'm not a fan of Shadowplay (primarily Nvidia's software limitations).

At 1080p60 using 50,000 Kbps (highest), I was still getting blocky recordings (bit-rate not being high enough) during any relatively fast motion (BF4 and CoD footage looked awful). I jumped over to OBS using NVENC with 65,000 Kbps bit-rate and that fixed the issue. If you can bump up the bit-rate more, do it.

This only fixes the issue in the recorded file, not Youtube trashing it (if that's what you mean).

The only other 4k option (that I know of, besides GPU) is to use a capture card (usually in a separate pc) like this one.

Does everything that you said above about the DeckLink model also apply to their Intensity model as well? I kind of like the idea of having an HDMI pass-through, plus I don't know anything about "SDI Video" interfaces.

I also see a non-4K model of the DeckLink, does most of what you said about the 4K model (save for the 4K part) apply here too, or is the ~$50 saving not really worth it in the long run?

There's the Intensity Pro 4K.

black magics are great cards. I've used a few professionally.
This one is very reasonable :
https://www.amazon.com/Blackmagic-Design-Intensity-Capture-Playback/dp/B00U3QNP7Q/ref=pd_sim_147_2?_encoding=UTF8&pd_rd_i=B00U3QNP7Q&pd_rd_r=67GFEQSM7DRG4PZQHJ42&pd_rd_w=bpa88&pd_rd_wg=rHoPM&psc=1&refRID=67GFEQSM7DRG4PZQHJ42