Bug 433392

SUMMARY
clip frames display incorrectly in user GUI.


STEPS TO REPRODUCE
1. put a clip on a videoline. Make it length 1 frame
2. hoover mouse on this clip
3. look in statusbar at bottom of the window for clip properties

OBSERVED RESULT
it displays:
image0.png (00:00:00.00-00:00:00.00), Position: 00:00:00.00, Duration: 00:00:00.01

EXPECTED RESULT
image0.png (00:00:00.00-00:00:00.01), Position: 00:00:00.00, Duration: 00:00:00.01

SOFTWARE/OS VERSIONS
Windows: 10

KDE Plasma Version: 
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Actually the GUI displays this consistently with the file format. It is also wrong in the file format:
 <entry producer="producer1" in="00:00:00.000" out="00:00:00.000">
The out frame is actually frame 1 not frame 0.

Observed behaviour occurs everywhere, not just in first clip in empty project and with any length. Just made the example easy to make reproduction easier.

Probably a bug in the file format, KDEnlive makes every clip 1 frame longer then specified in the file format. E.g.:
 <entry producer="producer1" in="00:00:00.000" out="00:00:01.000">
will produce a clip that starts on 00:00:00.000 and ends on 00:00:01:01
instead of 00:00:01:00. It shows a duration of 1:01 which is correct with respect to the file format, but incorrect to the gui.
I suspect that opening the project has logic in it that positions the in, calculates duration and calculates the out based on duration. The latter is flawed, there should be a -1 in there.