Now I get:

FLOWBLADE MOVIE EDITOR 1.14
---------------------------
Launch script dir: /usr/local/bin/FLOWBLADE/flowblade-1.14/flowblade-trunk
Running from filesystem...
MLT found, version: 6.4.1
Failed to import module app.py to launch Flowblade!
ERROR: No module named gi
Installation was assumed to be at: /usr/local/bin/FLOWBLADE/flowblade-1.14/flowblade-trunk/Flowblade

gi seems not to be in repository pool.

Am Donnerstag, 12. Oktober 2017 16:10:19 UTC+2 schrieb Michael Gehring:
On Thu, Oct 12, 2017 at 07:08:29AM -0700, 'Gerhard Kugler' via voidlinux wrote:
> But mlt is installed!

The python bindings are in mlt-python.