I am sorry that I apparently opened a can of worms here... Still, I am delighted that this motion tracking might become available in Tumbleweed anytime soon, thank you so much! Regarding the libmlt6 requirement - my Tumbleweed install does only include libmlt7 at this stage, mlt6 is gone for good and everything seems to be working fine. Kdenlive (minus motion tracking), video players (not sure if these need libmlt at all?)