STEPS TO REPRODUCE 1. insert a short video (or cut it short) 2. Rendering with different frame rate 3. Play video and check length OBSERVED RESULT Video length wrong (More frames = Video too short) (Less frames = Video too long and black image; "idle") EXPECTED RESULT Video length remains the same SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION