AviDemux/Linux - how to open vpy files

[NoX1911]

Hi,
any idea why Avidemux/Linux cannot open vpy files? It says no demuxer found. mpv opens vpy files properly.
AviDemux is compiled like this (https://gitlab.archlinux.org/archlinux/packaging/packages/avidemux/-/blob/main/PKGBUILD?ref_type=heads).

[qyot27]

mpv opens vpy files properly.
As video source, or as filter source?
As a filter source (-vf vapoursynth) is expected, because mpv can use VapourSynth as a dependency separately from FFmpeg. And this only applies to using it to filter some other video being played back.
As a video source (playback like a regular file), it's still subject to the same restriction as vanilla FFmpeg and you have to have explicitly enabled it in your ~/.mpv/config (or forced the demuxer for input when using FFmpeg). Also, you won't get any audio this way; neither of the libavformat vapoursynth demuxers (the one in upstream FFmpeg or the one added by the vapoursynth_alt patch) supports reading audio from the script.
The same would hold true of AviDemux, if you are even able to pass it lavf configuration options apart from whatever it allows you to select via the GUI.

[NoX1911]

I've put this into mpv.conf:

[extension.vpy]
demuxer-lavf-format=vapoursynth

And yes, it has indeed no sound (didn't notice that yet).

I thought i could use it like AviSynth in Windows (drag&drop). If its not possible i will try to experiment with 'vspipe' next.