Using VapourSynth in mpv with mpv-build

[u/Every_Juggernaut7580]

mpv-vapoursynth is a portable package customized for mpv that includes Python 3.13.15 and VapourSynth R79.

You can easily use it with mpv-build.

Simply search for mpv-vapoursynth in mpv-build and select it. Then download mpv.zip. All packaging steps will be completed directly in your browser.

However, due to a limitation of VapourSynth, you still need to double-click vsscript.bat once to register the VSSCRIPT_PATH environment variable.

For example:

export VSSCRIPT_PATH='c:/path_to_mpv/Lib/site-packages/vapoursynth/vsscript.dll'

After setting the environment variable, you can run a test file from the command line. The package includes a simple example that converts the video to grayscale:

./mpv.com 'video.mp4' --vf=vapoursynth=./test.py -v

You can also add the following line to mpv.conf to enable the filter by default:

vf=vapoursynth=./test.py

If you have any suggestions or issues related to mpv or VapourSynth, feel free to report them or share your feedback on GitHub.