If you go to Settings > Configure Kdenlive > Playback, there's an option to "Use GPU Processing (Movit Library) - restart Kdenlive to apply". As of right now, it's greyed out, but I have Kdenlive 15.09.0 development branch installed, mlt 0.9.8, libmovit2v5 1.1.3-3 and the latest nvidia proprietary drivers -- all on Kubuntu 15.10 x64 beta.

Is there a way I can enable GPU processing? And if so, how?

Thanks in advance!

JD