Error ....... was not created

[Selur]

Vapoursynth&plugins must be provided by the user.
I wrote scripts to build them, see: https://github.com/Selur/hybrid-vapoursynth-addon (always happy when someone offers patches or help with the scripts).
According to

Failed to load /usr/lib/vapoursynth/libvslsmashsource.so. Error given: /usr/lib/libgobject-2.0.so.0: undefined symbol: g_pointer_bit_unlock_and_set

Hybrid does find libvslsmashsource.so but can't use it since libgobject is missing.
try whether:

sudo apt-get install libglib2.0-dev

or

sudo apt-get install libglib2.0-0

helps.

Cu Selur