ffmpeg -i -f dshow -s 640x480 -r 15 -rtbufsize 3000k -i video="Logitech HD Webcam C510" -c:v libx264 -c:a mp2 -f tee -map 0:v -map 0:a "archive-20121107.mkv|[f=mpegts]udp://192.168.1.67:1234/"