Hi TheodoreFor flowblade 2.0/2.2 to work you'll need the testing version of mlt: 6.16.0-3
(i made a copy of it at http://phd-sid.ethz.ch/debian/flowblade/BACKUP/)
Also see, https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=940166 and https://github.com/jliljebl/flowblade/issues/597 Good luck,