ffmpeg stream desktop instead -i /dev/video0

Question

How can I set ffmpeg to stream desktop instead web cam -i /dev/video0 here is example command that I used

$ ffmpeg -f v4l2 -i /dev/video0 http://localhost:8080/feed.ffm

Answer 1

On Linux use x11grab:

ffmpeg -framerate 25 -video_size 1920x1080 -f x11grab -i :0.0 -vf format=yuv420p http://localhost:8080/feed.ffm