Hi
I thought I'd report back .
I've got it to work so far by using justmacros to change the input of the atem and map this to 12 different keys (for preview and cut) using justmacros.

I've then mapped the same 12 keys in vmix to always cut to the atem camera ingest into vmix ( coming in on a decklink sdi in )
So far it seems to work .
I have justmacros open in the background
plus the atem switching software and macroworks 3.1

It works even when they are not the focused window.

I don't know how stable this is , but I'll test it to check for conflicts
and hope someone tells me if I'm making an obvious mistake.

What I am getting at the moment is exactly what I had hoped for .

The atem 6 camera inputs come up with individual button button presses on 123456 on the xkeys( vmix also switches automatically to the atem ) and then all my vmix vids , cams stingers etc come after.

I

Hi Cormac

I have worked a lot with ATEM and vMix. I had on laptop for vMix with 2 or 3 monitors + 1 laptop for the ATEM with 1 monitor for Multiview.
My solution to control everything from a single computer was to use Synergy (a virtual KVM)
Then from the vMix laptop I used both the mouse and the keyboard to control vMix and when my mouse was moved to the ATEM laptop screen, then I could use the keyboard numpad keys on vMix host to switch the ATEM.
The thing with Synergy is to control 2 computers from a single keyboard and mouse.

It worked very well, just a habit to take. Btw I finally decided to move everything to vMix with multi input capture cards in order to be able to use multiple cam inputs at the same time, just just can't be done when using the ATEM.

My 2 cts
Guillaume