4K Capture Card Recommendations.

I wanted to see if anyone could help me find a cap card that fits the bill.

I have a card right now that will do 1080p/23.976 both in hardware and software. I was looking to capture some streaming at possible 4K with or without HDR. This is for a possible future project.

The problem is that most of the affordable cards that are used for game capture don't (or claim to not) support 23.976. At best I can hope for 30 or 29. Does anyone know of an affordable card that will do 2160p at 23.976? Maybe with HDR even though I know that’s pushing it. Thanks.

I use a blackmagic decklink mini 4k pcie. It will do any FPS you want, 23.976, 24, 50, 60, etc. and almost any hdmi format including 4k hdr10.

https://www.amazon.com/gp/product/B01M126X2N/

Sadly only straight PCM audio can be captured over HDMI with it, I have not found out how to capture 640kbit EAC3 as streamed by Amazon Prime. You can hear the digital noise but the EAC3 stream appears corrupted when saved.