ffmpeg -v verbose -rtbufsize 1000000000 -f dshow -i video="SCFH DSF":audio="Stereo Mix (Realtek High Defini" -r 25 -threads 4 -strict -2 -c:a aac -b:a 96k -ar 44100 -async 1 -c:v libx264 -preset medium -b:v 350k -bufsize 5000k -maxrate 500k -tune zerolatency -f flv "rtmp://blah"