docker-ffmpeg-broadcast.sh

ffmpeg -f lavfi -i 'testsrc2=size=1280x720:rate=60,format=yuv420p' \
  -f lavfi -i 'sine=frequency=440:sample_rate=48000:beep_factor=4' \
  -c:v libx264 -preset ultrafast -tune zerolatency -profile:v high \
  -b:v 1400k -bufsize 2800k -x264opts keyint=120:min-keyint=120:scenecut=-1 \
  -c:a aac -b:a 32k -f flv rtmp://transcoder/encoder/colorbar