We are currently streaming from a multiple camera system routed through a Roland V-1HD, output is 1080p/59.94, into an iMac loaded with ProPresenter 7.2 to introduce lower third screens over the video. The audio and video are in sync at the iMac. We then output over HDMI via a thunderbolt 3 adapter to the Webcaster X2.
Our regular upload speed is 7Mbps.
Audio is late in the streamed video. Any ideas as to the cause?