FFsplit is a software tool designed for capturing, encoding, and streaming live video content. However, it does not have built-in functionality for adding participants to a live stream, like a video conferencing tool would. It primarily interacts with streaming services by encoding the video and sending the stream to the platform (like YouTube or Twitch), but it doesn't handle multiple participants in the same stream. For live streams with multiple people appearing, you would typically use a different tool (such as Zoom, OBS with plugins, or dedicated streaming platforms that support guest integration) to manage the connections before broadcasting.