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smoorg avatar smoorg commented on August 20, 2024

Clearly you added wrong resolution, see man ffmpeg and search for X11 grabbing. There are bunch of examples with resolution.

X11 grabbing
       Grab the X11 display with ffmpeg via

               ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0 /tmp/out.mpg

       0.0 is display.screen number of your X11 server, same as the DISPLAY environment variable.

               ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0+10,20 /tmp/out.mpg

       0.0 is display.screen number of your X11 server, same as the DISPLAY environment variable. 10  is  the  x-offset  and  20  the
       y-offset for the grabbing.

If you need partial screen picker without a sound here's my script for that purpose. In case of adding sound you would have to tinker it yourself, I purposefully ignored that part. You have to install slop to make it work though. It works best if you bind it to certain keyboard shortut as you run script again to stop recording.

from larbs.

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