LiveLink Face OSC command to remotely trigger recording?

Hi,

I’m trying to build a master record trigger system for a live virtual production setup. We have 5 iPhones running LiveLink Face and need to trigger recording on all of them simultaneously from a Python script on a PC, without anyone having to tap the phones manually.

I know LiveLink Face supports OSC remote control for triggering recording — it’s mentioned in the App Store description and Epic’s blog post. I have OSC Server enabled on the phones and can reach them over the network (confirmed with ping and UDP socket tests).

However I cannot find the actual OSC command address string documented anywhere. I’ve tried the following with no result:

  • /RecordStart

  • /OSCStartRecord

  • /LiveLinkFace/RecordStart

  • /StartRecord

  • /OSCSetRecording

  • /Record

The only OSC command I’ve seen referenced publicly is /OSCSetSendTarget which is for configuring the outgoing target, not for triggering recording.

Can anyone provide the correct OSC command address (and any required arguments) to:

  1. Start recording

  2. Stop recording

  3. Optionally set slate name / take number

We’re on LiveLink Face version 1.5.0, iOS 17, Unreal Engine 5.6.

Thanks