24.04.2020, 00:50
I built Vapoursynth in virtual Ubuntu 16.04.6 and vspipe --version works even after building plugins. But mvtoolssf plugin failed to built during the process. Maybe if mvtoolssf plugin is missing, there is no issue with libmvtools.so and vspipe --version works. Later I will try to remove mvtoolssf plugin from the building process on my physical Ubuntu 18.04 machine to check if this make the miracle. If not, then Ubuntu 18.04 is the suspect.