To grab the contents of the window named “Calculator”: ffmpeg -f gdigrab -framerate 30 -i title=Calculator output.mkv If you want to limit to a region, and show the area being grabbed: ffmpeg -f gdigrab -framerate 30 -offset_x 10 -offset_y 20 -video_size 640x480 -show_region 1 -i desktop output.mkv To capture all your displays as one big contiguous display: ffmpeg -f gdigrab -framerate 30 -i desktop output.mkv You can also use gdigrab as input device to grab video from the Windows screen. You can list your devices with: ffmpeg -list_devices true -f dshow -i dummy Or ffmpeg -f dshow -i video='UScreenCapture' -f dshow -i audio='Microphone' output.mkv If you want to capture the audio that is playing from your speakers you may also need to configure so-called “Stereo Mix” device. If you need audio too: ffmpeg -f dshow -i video='UScreenCapture':audio='Microphone' output.mkv

You can refer to a list of alternative devices. This will grab the image from entire desktop. Use a DirectShow device: ffmpeg -f dshow -i video='screen-capture-recorder' output.mkv

Command for full screen windows 10