phantomjs runner.js | ffmpeg -re -thread_queue_size 1024 -y -c:v mjpeg \
-f image2pipe \
-framerate 30 \
-i - \
-f lavfi -i anullsrc \
-r 30 \
-c:v libx264 \
-x264-params keyint=60 \
-b:v 1000k -minrate 1000k -maxrate 1000k -bufsize 500k \
-pix_fmt yuv420p \
-f flv 'rtmp://rtmp-api.facebook.com:80/rtmp/---'