VapourSynth

Introduction

You can pass a VapourSynth script to FFEncoder using the -VapourSynthScript parameter. There are a few things to know before using this feature:

• For Dolby Vision encodes, VSPipe is used to pipe the script to x265 - this is due to ffmpeg's inconsistent handling of RPU files, and should only be temporary as it adds extra overhead
• For all other encodes, the builtin ffmpeg format is used. For this to work, ffmpeg must be compiled with the --enable-vapoursynth flag
• All video filtering parameters are ignored when a VapourSynth script is used. ffmpeg cannot filter when receiving input from VS, so be aware of that
• The -InputPath parameter is still required, even if a VS script is used - the input file is used to collect a lot of metadata utilized throughout the script, as well as audio/subtitles if selected

Examples

Using this feature is pretty straightforward:

PS > FFEncoder.ps1 'in.mkv' -CRF 18 -VapourSynthScript 'C:\Path\To\vsscript.vpy' -o 'out.mkv'