Special variables for show-text

[lamyergeier]

In input.conf

i show-text "Filename: ${filename}"

This shows the filename when i is pressed.

Where can I find a list of all of these special variables? For example I want to show-text the dirname (directory path) of the video.

[guidocella]

https://mpv.io/manual/master/#property-list

But there is only ${path} and no directory property.