ATEM - Non Standard Video Formats

Is it possible to supply hardware such as ATEM Television Studio non standard video formats via the 12G‑SDI inputs?
In our case it would be 2880x1920@60p.

This is a user form, you need to make this request directly to BM vial their Regional Support office in your region.

So no it is not, the systems only accept a variety of smpte standard video. If you want to mix non standard resolutions you will need some other hardware, maybe http://sparklive.net/dfuser/ this can help.