HOW TO SCREEN RECORD UBUNTU?

If ffmpeg -encoders |grep h264 output NVIDIA HVEC somewhere there, ubuntu uses hardware encoding by default.

ffmpeg -f x11grab -video_size 1920x1080 -framerate 60 -i :1 -v verbose -f pulse -i default -vf format=yuv420p output.mp4

ffmpeg -f x11grab -video_size 1920x1080 -framerate 60 -i :0 -v verbose -f pulse -i default -vf format=yuv420p output.mp4

crtl-c - to finish