Great to hear that it is possible. I would very much like to find out what is needed to make my Mac work with ffmpeg. I can show the video on my Mac using Python libraries pygame and cv2, but with ffmpeg I've had no succes so far.
My Mac IOS is Mojave (MacBook Pro 2018 model) and for ffmpeg I downloaded a static ffmpeg build from ffmpeg.org. Could it be permissions? (I used chmod +x ffmpeg) Any other suggestions?