https://bugs.kde.org/show_bug.cgi?id=364742
--- Comment #5 from Jean-Baptiste Mardelle <j...@kdenlive.org> --- Ok, the slowdown is caused by the frei0r levels effect (added as a custom 70D in your project). Filters are processed on the project's frame size - in that case 4k, which is why you get such slowdown. As a workaround you can disable timeline effects when doing the editing and re-enable only when needed. "Timeline > Disable timeline effects" allows you to easily enable/disable all timeline effects. -- You are receiving this mail because: You are watching all bug changes.