Thanks god KDenLive is catching up. Cinelerra[1] (and the cinelerra-cv community fork) was/is more advanced, but its interface is stuck in the 90's, it manage to crash twice per CPU cycle due to horrible code and is resealed without warning in big code dump every year or so. I lost -so- much time in this back in high-school (10-12 years ago) because it was the only high end editor on Linux. Back then the early KDenLive version were not so much better stability wise. However they came a long, long way. Too bad I don't need Video editor anymore, but I still compile KDenLive to see the new features.
Heh, this year is the first time I've actually been able to get Cinelerra to run. I think the worst time I ever had with it was trying to compile it on Slackware a few years ago. Hours of compilation and nothing to show except insta-crash.
[1] http://cinelerra.org/2015/index.php/features/editing