White artifacts during playback and after rendering

[Milan Knizek]

Binary package hint: kdenlive

Ubuntu 10.04 x86_64
kdenlive 0.7.7.1-0ubuntu1
ffmpeg 4:0.5.1-1ubuntu1
melt 0.5.4-1

Kdenlive renders white artifacts in black areas of the image - both in preview and output video, no matter which format is chosen.

This was reported here:
http://www.kdenlive.org/mantis/view.php?id=1509
and here:
http://sourceforge.net/tracker/?func=detail&atid=613414&aid=2972137&group_id=96039

and appears to be a problem with melt.

If confirmed, can melt be updated to a more recent version?

[Vanessa Lee (vanessax)]

For me I primarily get one pixel lines at the very edge corners after rendering from clips using pan and zoom.

[Matthias Czapla (dermatsch)]

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.