ffmpeg -f gdigrab -framerate 24 -offset_x 100 -offset_y 100 -video_size 1000×580 -i desktop out.mpg

ffmpeg -f dshow  -i video=”UScreenCapture” -vf crop=1200:500:10:10 -r 30 -vcodec mpeg4 -q 12 out.mp4

ffmpeg -rtbufsize 1500M -f dshow  -i video=”UScreenCapture” -vf crop=1200:500:10:10 -r 30 -crf 0 -vcodec libx264 -q 12 out.mkv

ffmpeg -rtbufsize 1500M -f dshow -r 24 -i video=”UScreenCapture” -vf crop=1200:500:10:10 -crf 0 -vcodec mpeg4 -x264opts keyint=1   out.mp4

ffmpeg -rtbufsize 1500M -f dshow -i video=UScreenCapture -vcodec h264 -r 15  -q 12 -pix_fmt yuv420p -vf crop=1200:800:10:10 out.flv

ffmpeg -rtbufsize 1500M -f dshow -i video=”UScreenCapture” -vcodec libx264 -crf 0 -preset ultrafast output.flv

ffmpeg -f gdigrab -framerate 16 -offset_x 100 -offset_y 100 -video_size 1000×580 -i desktop  -vcodec h264   -q 12 -pix_fmt yuv420p out.flv

ffmpeg -rtbufsize 1500M -f dshow -i audio=”virtual-audio-capturer” -f gdigrab -framerate 30 -draw_mouse 1 -i title=RecordWindow -pix_fmt yuv420p -profile:v baseline -y test.mp4