A simple script for generating screenshots with Vapoursynth

Overview

Vapoursynth-Screenshots

A simple script for generating screenshots with Vapoursynth.


About

I'm lazy, and hate changing variables for each batch of screenshots I create. This script accepts input from the command line and generates screenshots using ScreenGen from the awsmfunc Vapoursynth script.

Included is a PowerShell wrapper script (all platforms) to make entering CLI arguments easier. Vapoursynth parses arguments from the global dictionary (so no argparse), which is pretty tedious to type. The PowerShell script gives you tab complete functionality and more input validation. It's optional - screenshots.vpy works just fine on it's own.

By default, screenshots are generated with character "tags", or letters that distinguish them and make them easy to sort. The script will check for existing tags and increment the characters so other screenshots in the same directory are not overwritten.


Dependencies


Tonemapping

If the input files are UHD, the script can tonemap them automatically using the tonemap plugin. Tonemapping algorithms:

  • Hable
  • Mobius
  • Reinhard

The default value is Mobius, but you can specify which one you want using the tonemap_type parameter. You can also specify the exposure (gain) for the screenshots using the exposure parameter.


Parameters

NOTE: PowerShell parameters are case insensitive, whereas Python's are not. Python parameters must be lowercase

Parameter Name Description
[-]source Path to the source file (or primary file)
[-]encode Path to the encode file (or secondary file)
[-]screenshots Optional path to screenshots. If one is not provided, the root of encode will be used
[-]frames A list of frame numbers for screenshots. Passed as a Python list, i.e. "[1,2,3,4]"
[-]offset Optional frame offset for test encodes
[-]title Title tag for frame info overlay. Applies to encodes. Default is "Encode"
[-]tonemap_type Tonemap algorithm to use (hable, mobius, reinhard). Default is mobius
[-]exposure Gain to apply to image. Default is 4.5

Examples

PowerShell

All PowerShell parameters can be used positionally. See Get-Help .\wrapper.ps1 or read the comments to see them all.

#Named parameters
PS > .\Wrapper.ps1 -Encode "C:\Path\file.mkv" -Encode "C:\Path\file2.mkv" `
                   -Frames 100,200,300 -Title "My Encode" -TonemapType hable
#Positional parameters
PS > .\Wrapper.ps1 "~/videos/source.mkv" "~/videos/encode.mkv" 100,200,300 "~/videos/screens" hable "My Encode"

VSPipe

#Pass parameters using --arg
~$ vspipe --arg "source=~/videos/source.mkv" --arg "encode=~/videos/encode.mkv" \
              --arg "frames=[100,200,300]" --arg "tonemap_type=hable" screenshots.vpy -
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