Hi Everyone!! My application is not audio-only. I want to export a mixed audio file containing audio from all participants in the room. I tried to stream only audio to rtmp using egress RoomCompositeEgressRequest as below, but it doesn’t work. Could i know how?

request := &livekit.RoomCompositeEgressRequest{
		RoomName:  roomName,
		Layout:    "speaker-dark",
		AudioOnly: true,
		Output: &livekit.RoomCompositeEgressRequest_Stream{
			Stream: &livekit.StreamOutput{
				Protocol: livekit.StreamProtocol_RTMP,
				Urls: []string{
					streamUrl,
				},
			},
		},
	}