I have installed Kdenlive and I'm trying to do my first video 'open source'...
...the source file is a 720HD file of about 21 minutes... as first trial I shortened the file (using the green arrow) at 4:06 minutes. The problem is that when I redner the outcoming file is 11.50 minutes.
How can I cut the original file and render it at the new size?

Does it also play this length in the project monitor?