How to automatically set a matching display refresh rate on Gnome (Linux)?

[user-1-2-3-4-5]

The display refresh rate can be changed from the command-line at least with the gnome-monitor-config program (or now, preferably, with the upstream gdctl (GNOME Display Control):

After inspecting your current configuration, the major Gnome display settings can be changed with a command:

gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected] # Disables the monitor altogether to avoid issues with video playback (such as windows launching to a wrong screen), switches to the TV.

To return to the computer display:

gnome-monitor-config set --logical-monitor --primary --monitor=DP-1 --scale=1.5

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How can the process be efficiently automated? With a LUA addon or a Bash script which inspects each file with mediainfo?

Currently I set the display refresh rate manually — mostly by viewing the video information in mpv, then running an appropriate command and resuming playback:

       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]
       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]
       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]
       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]
       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]
       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]
       gnome-monitor-config set --logical-monitor --primary --monitor=HDMI-1 --scale=2 [email protected]

note: I haven't had success with the display-sync-related options — and above all, running your display at the analogous refresh rate (i.e. 23.976 Hz for 24p content) is optimal, isn't it?