View source for Ffmpeg screen capture x11grab

screen capture whole display, where this example resolution 1920x1080 = monitor resolution sarting at the top left corner of screen
 ffmpeg -f x11grab -r 10 -s 1920x1080 -i :0.0 /var/video/video.mp4

screen capture part of display, where example resolution starts at an offset of 1250x525(x,y) which effectively records the the bottom right hand corner of the screen. 
 ffmpeg -f x11grab -r 10 -s 650x480 -i :0.0+1250,525 /var/video/video.mp4

[[category:video]]