Good progress. It looks like the wrapper works fine now:
$ ./ex01
ptr 0x557ede9361a8 --> [versionString = 0x7f0e3ea18860"VapourSynth Video
Processing Library\10"
"Copyright (c) 2012-2019 Fredrik Mellbin\10"
"Core R48\10"
"API R3.6\10"
"Options: -\10"
"",
core = 48,
api = 196614,
numThreads = 8,
maxFramebufferSize = 4294967296,
usedFramebufferSize = 0]Still some work to do.
