ffmpeg -copyinkf -f dshow -i video="USB2.0 UVC VGA WebCam":audio="麦克风 (Realtek High Definition Au" -q 4 -s 640*480 -aspect 4:3 -r 10 -vcodec flv  -ar 22050 -ab 64k -ac 1 -acodec libmp3lame -threads 4 -f flv rtmp://127.0.0.1/RTMP/RtmpVideo