This question is perhaps a bit esoteric, but I’m using VLC for music in Zorin 16 Core. I enjoy Visualizations like ProjectM and Goom while listening. I’ve downloaded them, but for the life of me cannot figure out where to extract them in order for VLC to recognize them. And there does not seem to be a way to “point” to just any Directory. Thanks!
The best I could figure is -
/var/lib/flatpak/app/org.videolan.VLC/current/active/files/share/projectm
Hey @MarkMcCoskey!
I trust this little page will give you a clue as to where it’s looking for the visualization files. It’s also configurable, so you can switch it. 
Unfortunately I’ve tried the suggestions I saw in the article and comments section. This was the page where I downloaded ProjectM from. Thanks!
So, my question would shift toward the installation source.
Did you install VLC from the Software manager or via the command line?
There are several locations you can install VLC from, and each uses a different folder for its settings.
I installed it through the Software Manager, which I assume is why it’s under the /var/lib/flatpak/app/org.videolan.VLC/ directory.
My VLC is installed via Zorin’s repository, however, I had a peek at other flatpaks. Normally, you should be able to find it under the address you pointed, and then attach the architecture (i.e. x86_64/version/really_long_number/) - by replacing “version” and the “really_long_number” which is the code-folder for the files installed.
Alternatively, you can search for the “Visualizations” or “visualizations” folder (Linux is case-sensitive, so those two will produce different results).
Type in - if not already installed - terminal:
sudo apt install mlocate
In Ubuntu-based distributions, it automatically updates the files index database. So, from there on you can try to locate the folder by typing one of the two:
locate visualizations
locate Visualizations
Hopefully this will help.
The only mention I’m finding is a png file named -
var/lib/flatpak/app/org.videolan.VLC/x86_64/stable/ddc96bdf02c0f901261358d0f9a3cd5b2f6f0d966023622a990363f7c3b42378/files/share/projectm/src/projectM-qt/images/icons
I see what you mean by really_long_number” .
All of the plugins appear to be in - /var/lib/flatpak/app/org.videolan.VLC/x86_64/stable/ddc96bdf02c0f901261358d0f9a3cd5b2f6f0d966023622a990363f7c3b42378/files/share/projectm, yet, within VLC, they still don’t appear as an option.
Thanks!
