this is the gear description of the direct data transfer of various companies: https://mocap.reallusion.com/iclone-motion-live-mocap/gears.html#gear-comparison
also can get their Python api. You have to have a form to fill out and someone will contract you in a few days.
what is iClone + UE4?
https://www.reallusion.com/iclone/live-link/unreal-engine/#unreal-render
These are more examples for UE4 mocap:
https://www.enter-reality.it/blog/how-to-use-unreal-engine-for-full-body-motion-capture-use-case-and-in-depth-review-of-noitom-perception-neuron-and-ikinema-orion
https://forums.unrealengine.com/development-discussion/animation/1625785-unreal-engine-for-full-body-motion-capture-in-depth-review-of-perception-neuron-and-ikinema-orion
I think i lost the one from Intel where the guy has 30+ sensors.
i dont work for Reallusion or Unreal or am a Russian Spy
This is what i am using for UE4:
Rayan Reos Pillar Woman