I tried to render a project into a .mp4 file. Over and over again. kdenlive always said "Rendering finished" - when about half of the project was completed. It took me some days to find out that there was not enough space left on the target directory. Cleanig the target directory solved the problem. To the wishlist: Give a message if target directory has not enough space. Reproducible: Always
Thanks for the report. I am working on the problem.
Fixed using latest Kdenlive and MLT from git, thanks