Video Recording/Live Streaming - Four Cameras

Thank you in advance for any insight or help you can offer because I've spent an inordinate amount of time trying to figure this out.

I want a dual setup system with the same cameras for both. I want a live streaming setup with the cameras (Four Studio 4K Pro G2) going to both my Mac M1 Studio for 4k live streaming through Ecamm Live (Ecamm Live has its own software camera switcher for multiple cameras that only works with the DeckLinks for separate sources).

Then, I want to have a parallel setup explicitly for recording in 4k (BRAW) with the ATEM Mini Extreme ISO. I want to remotely control the camera settings with the ATEM mini.

Here’s my problem: I can’t figure out how to get a 4k live stream through BM products with the camera control, or rather, BM doesn't make finding the answer easy.

Here is my idea: 1) Decklink 8k Pro with Program in from Cameras for the 4K with ATEM SDI Extreme ISO (a different ATEM for live streaming), creating a loop between the Decklink, the Cameras, and the ATEM SDI, providing the program feed to enable camera controls.

Does anyone know if this will work? If not, what alternatives would you suggest that accomplish the same goal?

You cannot record or input 4K using the ATEM Mini Extreme ISO. It's max input resolution is 1080p60. If you're intent on having the rest of the system run in 4K, you'd have to signal split each camera feed and externally downconvert each 4K source to 1080p to enable ISO recording on the ATEM Mini Extreme ISO.

To do this, you'd need the likes of a Decimator HDMI / SDI 4K Cross Converter per input.

Why loop? Use (hd) HDMI with an Atem Mini and use the sdi (uhd) output for the Decklink.

Good Luck