UE4 Motion Capture Plugin with VIVE Trackers

Vive

The plugin is intended to retarget real-time human body motion to UE’s skeletal mesh by using SteamVR-compatible VR Headset (HTC Vive), Motion Controllers and tracked devices (Vive Trackers). It supports custom skeletal meshes and can be used both for motion capture recording and for in-game player body representation. Compatible with the HTC Vive Trackers and TrackStrap + TrackBelt. 

https://www.unrealengine.com/marketplace/vive-mocap-kit