vapoursynth-mvuscale 0.1.3

Native VapourSynth (API4) filter that scales mvutensils motion vectors for smdegrain_bis UHDhalf

vapoursynth-mvuscale

A tiny native VapourSynth (API4) filter that scales mvutensils motion vectors between resolutions — the manipmv.ScaleVect replacement used by the smdegrain-bis UHDhalf path, where motion is searched at half resolution and the vectors are multiplied back up to full resolution before Degrain.

It registers core.mvuscale.ScaleVect(clip, scale=<int>), operating on mvutensils' vector frame-props (geometry ×s, packed vectors ×s, SAD ×s²). It links no libpython and no libvapoursynth, so one build per platform serves every Python 3.x.

Install

pip install vapoursynth-mvuscale      # drops the plugin under vapoursynth/plugins/mvuscale/

smdegrain-bis loads it automatically when UHDhalf=True. A host that manages its own plugin directory can instead relocate the wheel payload (or the native/build.sh output) into that directory, where it autoloads.

Build from source

pip wheel native/ -w dist/            # scikit-build-core + CMake
# or, just the .so:
CXX=g++ bash native/build.sh          # -> tests/_plugins/mvuscale/libmvuscale.so

The VapourSynth API4 headers are vendored under native/include/ (see its NOTICE), so no VapourSynth SDK is required to build.

Licence: GPL-3.0-or-later.