On the KDEnlive subreddit, it was suggested to me to submit a feature request here, so there it is !

Here is the situation: I have a headless server that has well enough power to pre-render proxies for my videos so I can edit on my workstation... I already figured-out a script to auto render the proxies on a RAM drive...

I have yet to find a way to include those proxies KDEnlive...

The only workaround I found was to use the proxies as "main files" and replace them with the originals via a search-and-replace in the .kdenlive file, but it introduces many other issues.

Is it possible to provide external proxies manually? (the external proxies function only allows certain formats, nothing generic)