FFMPEG Command to Extract Audio Mp3 From Mp4 or Any Extension Video in Command Line | FFMPEG Convert MP4 to Mp3 in Windows 10 Full Tutorial For Beginners.To speed up the encoding process, you can use lossless encoding and disable advanced encoder options, e.g.: ffmpeg -video_size 1920x1080 -framerate 30 -f x11grab -i :0.0 -c:v libx264rgb -crf 0 -preset ultrafast output.mkv If your CPU is not fast enough, the encoding process might take too long. For example, with NVIDIA hardware encoding: ffmpeg -f gdigrab -framerate 30 -i desktop -c:v h264_nvenc -qp 0 output.mkv You can use hardware acceleartion to speed up encoding and reduce the load on your CPU. 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
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