On the face of it, you might think I've gone a little mad - but bear with me.

This has a lot of potential uses, but let's look at the simplest application - making a trailer for your latest masterwork/blockbuster.

Now you *could* render the whole thing out as a movie file - preferably to a lossless codec - and load the whole thing back in as single clip but that's a waste of both time and space (a lossless codec typically would make a very, very large file!)

However, if you could just load the project (unrendered) but as a single clip, you could so precisely the same thing as a rendered clip and only render the bits you need. This sort of thing is useful if you wanted to fake some anamorphic (black) bars, apply a single grade across the whole project or a bundle of other things that are easier to do as a pre-comp.

It's an option offered in Natron (and After Effects, but not in the same way) and it could be pretty handy to have in Kdenlive.

(Now watch someone point out that it already does this!)

you can save your editedproject as an mlt and then import it in another project as a single track... maybe that helps?

Do you know about this option https://userbase.kde.org/Kdenlive/Manua ... one_Option