- create an event and setup custom ingestion so you get an rtmp url, then use something like to stream from a mac's webcam:
ffmpeg -f avfoundation -i "default" -re -ar 44100 -ac 2 -acodec pcm_s16le -f s16le -ac 2 -i /dev/zero -f h264 -acodec aac -ab 128k -g 50 -strict experimental -f flv -s 426x240 "<rtmp_path>/<stream_id>"