ARRI's Live Link Metadata Plug-in for Unreal Engine streams relevant metadata from the ARRI camera system to the Unreal Engine via the Universal Motor Controller (UMC-4) or natively via the Alexa35 camera. It enables the transmission of real-time lens metadata as well as relevant camera metadata, such as camera state (recording mode, ready to record, errors, warnings...).

ARRI Live Link Metadata
The Plug-In for Unreal Engine