The current preview video track, if started.
Reads the current microphone level (0..1) for a preview meter. Returns 0 when audio is not started.
Starts (or restarts) the preview microphone track and wires a live-level analyser.
OptionaldeviceId: stringOptional microphone device id.
The preview audio track.
Starts (or restarts) the preview camera track, optionally on a specific device.
OptionaldeviceId: stringOptional camera device id.
The preview video track.
Stops all preview tracks. Call when leaving the PreJoin screen.
Stops the preview audio track and tears down the analyser.
Stops the preview video track.
A live, room-free media preview for a PreJoin screen.