yordanoweb/capture_screen_region_ffmpeg.md

Created February 3, 2026 16:59

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Capture a Screen Region with ffmpeg

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capture_screen_region_ffmpeg.md

Capture a Screen Region with ffmpeg

Install the package slop for calculating the rectangle.

sudo apt install slop

Store in variables the region selected with mouse

read X Y W H < <(slop -f "%x %y %w %h")

Capture the region with ffmpeg

ffmpeg -f x11grab -video_size ${W}x${H} -framerate 30 -grab_x $X -grab_y $Y -i :0 -c:v libx264 -preset ultrafast -crf 18 -pix_fmt yuv420p "$HOME/Videos/output_$(date +%F_%H-%M-%S).mp4"

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