Screencasting

Capture a video of your actions on the screen and accompanying audio and you have a screen cast.

This method is for Linux, probably OS-X too, is easy without bells and whistles.

Software

Install, if you don’t have it: Ctrl-Alt-t (voor terminal)

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sudo su
apt update
apt install vokoscreen
apt install wmctrl
apt install screenkey
apt install gnome-subtitles

Wmctrl

Window manager control.

First you need information about the names of active windows:

wmctrl -l

For example, this page presents itself as:

0x03c00053  0 wswl Screen-casting - van der Worp - Mozilla Firefox

Second, you want to set the resolution of the screen cast and the position of the window. You can prepare this for multiple windows and use Alt-Tab during the cast. In this case:

wmctrl -r Screen-cas -e 1,0,0,1920,1080

What this line does: Move a window with name fragment “Screen-cas” to left-top, coordinate 0,0 and resize it to 1920,1080.

Screenkey

For showing what you type. After starting, open it from your tray to tune it. Fiddle a bit with transparency and size and colours. For mouse actions, consider Key-mon which I don”t use because it somehow influences virtual machine behaviour when switching windows.

Vokoscreen

What more is there to explain? Check tabs and presto, click start.

Gnome subtitles

Play your cast and write subtitles under the same filename.srt.

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