SUMMARY If I add a small video and an .mp3 to the track and render the project it takes about 4 hours and has 20 minutes of extra blank space for seemingly no reason. My format was .mp4, but this shoudn't really matter. Quality settings are default. STEPS TO REPRODUCE 1. Open apt based kdenlive make simple project (HD 1080p 30fps) 2. Add Video and audio and render 3. See 20 minutes of extra dead space OBSERVED RESULT 20 minutes of extra dead space and about 600% extra render time EXPECTED RESULT Much faster renders and video should match timeline and not have extra dead space in it. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Kubuntu 19.04 (available in About System) KDE Plasma Version: 5.15.4 KDE Frameworks Version: 5.56 Qt Version: 5.12.2 ADDITIONAL INFORMATION
This has been fixed in more recent releases. You can test from one of the latest AppImages: https://files.kde.org/kdenlive/release/kdenlive-19.04.3-x86_64.appimage.mirrorlist