ffmpeg -re \ -f lavfi -i "testsrc2=size=1280x720:rate=30" \ -f lavfi -i "sine=frequency=440:sample_rate=48000" \ -c:v libx264 -preset ultrafast -tune zerolatency \ -c:a aac \ -f mpegts \ "srt://video.ciakstack.com:9999?\ streamid=default/live/testcam&pkt_size=1316"