lf VS mpv-image-viewer

Also, considering your code, I am not sure, bit I think it is a terrible idea to install libraries on other people computers without clearly stating it, or perhaps stating it as a requirement and what is going to happen. I am referring to your "test suite". Especially since you are actually using ERT which is included in Emacs. Why should you fetch org, undercover or Quelpa??!! or even require it for your tests is an even bigger mystery, not to mention other libraries. You should probably redesign your tests completely. I haven't looked much at rest of your code in tests, or your main code, I just saw the first lines of tests.el.

How would I use MPV as an image viewer, I have tried this link, but it doesn't seem to work as soon as I open an image file, it plays for like 2 seconds that MPV "exits" the file, possibly I would have to toggle inf loop on all image files, but I don't know how I would do this

Mpv can do most of the things you want. I use it as image viewer and comic reader it's a very powerful and customizable software. The only issue I got with it as image viewer is that the scrolling is not smooth. Here's a GitHub page to start using mpv as image viewer : https://github.com/occivink/mpv-image-viewer

Try mpv https://github.com/occivink/mpv-image-viewer

https://github.com/occivink/mpv-image-viewer https://github.com/mpv-player/mpv/issues/7983

Copy https://git.sr.ht/~guidocella/mpv-image-config/tree/master/item/scripts/image-keybindings.lua#L60 or https://github.com/occivink/mpv-image-viewer/blob/master/scripts/image-positioning.lua to a script in the scripts directory within mpv's configuration directory, then use it by binding script-binding drag-to-pan.

For image viewing I either use eye-of-gnome or, since a few weeks, mpv with the following extensions: https://github.com/occivink/mpv-image-viewer

mpv with the gallery view plugin makes for a great video/image previewer

Image viewer: MPV with mpv-image-viewer scripts