Comment 6 for bug 1246976

Thanks @ Olivier!
The
    https://answers.launchpad.net/openshot/+faq/1861
faq seems to be a bit dated, libmlt5 and python-mlt5 are no longer available from the repo, but libmlt6 and python-mlt6 are - although using
    sudo apt-get upgrade libmlt6, libmlt-data libmlt++3 python-mlt6 melt
returns:
    E: Unable to locate package libmlt6,
In any case, using Synaptic, I installed libavformat-extra-54, libmlt6, and python-mlt6, and upgraded libmlt++3, melt, and libmlt-data, and restarted openshot, but the crashing persists.
Any clues?
Thanks,