https://bugs.kde.org/show_bug.cgi?id=394825
--- Comment #1 from NicoD <dekerfn...@hotmail.com> --- Some extra information. I tried to compile version 18.04 with the instructions here: https://community.kde.org/Kdenlive/Development I chose refactoring_timeline I'll try again with the other. For some strange reason I ended up with version 17.11.70. There it performs even worse. Result with the NanoPC T3+ was 2h49m17s. What I forgot to mention was that the places where it performs very badly are places with a dissolve and 2 x difference transitions. The places where there is no transition or effect it performs good. I still hope you can help me solve this problem. I would expect these boards to do this in under an hour. That's why I bought them, I spend a lot of money on both. I don't want this to be in vain. Thank you for your attention. I'll keep posting my progress here too. Greetings. NicoD -- You are receiving this mail because: You are watching all bug changes.