https://bugs.kde.org/show_bug.cgi?id=456830
--- Comment #3 from Mihai Vasiliu <mihai.vasiliu...@gmail.com> --- For anyone having the same issue or interested in fixing the bug, I have found a workaround: If you add an Alpha Operations effect to both images that are meant to use the MixClips effect, the desired transition is now possible without the black bars. Check out the workaround attachment. So the issue is definitely with the alpha and must be addressed in the MixClips effect itself. -- You are receiving this mail because: You are watching all bug changes.