VIDEO

see also audio recording

candidates for screen recording on linux

• obs-studio (ppa)
  can capture a screen (recording) , but is much more: editing videop as well

• recordmydesktop , in Package Manager

• ==Kazam== (Software Manager)
  suitable for beginners because of its minimalist interface , can recorde audio & webcam at the same time as the screen output

• Simplescreenrecorder

Kazam

test 1 : 10 min YT video

docu

https://www.movavi.com/learning-portal/best-linux-screen-recorders.html

https://superuser.com/questions/1428469/how-to-record-all-running-browser-screens-via-ffmpeg-in-linux-ubuntu

I am running browser instances inside a docker.
I need to record the browser actions inside docker.
Running  ffmpeg -f avfoundation -i "1" -pix_fmt yuv420p -r 25 out.mov is recording the whole screen .
How can i record only browser actions ?