Comment 2 for bug 577334

I have the same problem with OpenShot 1.1.3-1 which uses libmlt2 0.5.4-1 on lucid x86_64. Attached screenshot shows vertical black and white lines in dark areas of exported video. Can also be seen playing the unmodified source files straight from camera with melt command line player. Seems to be this upstream bug in mlt:
http://sourceforge.net/tracker/?func=detail&aid=2972137&group_id=96039&atid=613414
which seems to be fixed in 0.5.6. Can we hope for an update in lucid soon? OpenShot seems to be the only user friendly editor capable of converting framerates and encoding highly efficient h.264 output. Pitivi, Cinerella et al don't work in one way or another. This problem here is the only show stopper ATM.