PowerShell 7+ (pwsh.exe)
ffmpeg - Must be in system PATH
ffprobe - Must be in system PATH
rife-ncnn-vulkan - Must be in system PATH and also defined the environment variable RIFE_HOME to the same directory
upscayl-bin - Must be in system PATH and also defined the environment variable UPSCAYL_HOME to the same directory

ffmpeg

To install ffmpeg on Windows, download it from ffmpeg.org and add it to your system PATH.

rife-ncnn-vulkan

To install rife-ncnn-vulkan on Windows, see the RIFE 4.26 installation guide. Add it to your system PATH.

upscayl-bin

To install upscayl-bin on Windows, see the Upscalers installation guide. Add it to your system PATH.

NCNN_GPU_ID

The environment variable NCNN_GPU_ID is used to specify the GPU device ID for ncnn-based applications.

This environment variable must be set for both rife-ncnn-vulkan and upscayl-bin.

The value stored in NCNN_GPU_ID will be either:

0 — use the first Vulkan-capable GPU (device index 0). If you have multiple GPUs, they'd be 0, 1, 2, etc.
-1 — use CPU only (no Vulkan GPU is available).

These map directly to the -g flag values accepted by both rife-ncnn-vulkan and upscayl-bin:

`-g` value	Meaning
`0`	First GPU
`1`	Second GPU
`2`	Third GPU
`-1`	CPU

Scripts Overview

Script	Purpose
Clone-Image.ps1	Clone/copy image files with optional resizing (cover-scale then crop), format conversion, and quality/compression settings
Clone-Video.ps1	Clone/copy video files with optional frame range and sequence extraction
Compare-Videos.ps1	Combine 2 to 4 video files into a single 1920x1080 side-by-side or grid comparison video
Create-Clip.ps1	Create a clip of a frame range from a video, named from the source with a suffix (default `-Clip`)
Create-FullSubtitle.ps1	Creates a full subtitle file from a video file and two SRT subtitle files by combining them with adjusted timing and sequential numbering
Create-PillarBox.ps1	Wrap a video in a 16:9 frame with selectable side-bar effects (black, white, blurred-background variants)
Create-Scenes.ps1	Detect scene changes with ffmpeg and extract each scene as a separate clip using Create-Clip.ps1
Create-ShortClip.ps1	Create short clips from videos with cropping and overlay options
Create-Turnaround.ps1	Combine a sequence of images into a single turnaround (character reference sheet) image, in a row or a grid
Crop-Clips.ps1	Batch crop videos generated by LTX-2, Kling and Wan from their non-standard resolutions to standard ones (also scales any square video to 1080x1080)
Get-Frame.ps1	Extract a specific frame of a video to PNG, with the image name derived from the video and frame index
Get-FramesCount.ps1	Get total frame count of a video
Get-FramesRange.ps1	Extract a range of frames to PNG images
Get-LastFrame.ps1	Extract a specific frame or last frame to PNG, with an optional filename pattern
Get-VideoAudio.ps1	Extracts audio in either WAV or MP3 format from a video file
Get-VideoInfo.ps1	Extract and display video metadata from comment tags
Stitch-InBetween.ps1	Generate interpolated in-between frames between two images using RIFE and encode to video

Important:

All scripts require PowerShell 7+ (use pwsh.exe)
Each script has its own Windows command file (.cmd) that calls the PowerShell script

Scripts Installation

The scripts are available from two locations:

SVN: public-svn, project: Video Processing Scripts.
Git: git.gurusushi.dyndns.org, repository: guru/Video-Processing-Scripts.

git clone https://git.gurusushi.dyndns.org/guru/Video-Processing-Scripts.git

Note: there is a Update-Video-Processing-Scripts.cmd script that can be used to update the directory from Git to get the latest version.

Add the project folder to your PATH environment variable to access the scripts from any location.

Agent Skill

SKILL.md is an agent skill for AI coding agents (such as Claude Code or Devin). It teaches the agent how to use these scripts safely, so the agent does not have to rediscover the documentation for each task.

What it covers:

Prerequisites and environment: PowerShell 7+, ffmpeg, ffprobe, rife-ncnn-vulkan and upscayl-bin, and the RIFE_HOME, UPSCAYL_HOME and NCNN_GPU_ID variables. The agent checks them once before first use, and stops to ask you if something is missing instead of installing it.
Safety rules: it always previews with -WhatIf first, never passes -Confirm, and lists which scripts overwrite or delete existing files.
Script catalog: every script with a one-line purpose and a link to its page. The agent loads a page only when it needs the details.
Workflows and troubleshooting: common recipes, such as clipping a frame range or detecting scenes, and the documented error messages with their fixes.

To use it, copy the whole skill folder, not only SKILL.md, into your agent's skills folder, and name the copy video-processing-scripts. SKILL.md links to the documentation pages by relative path, so those pages must sit next to it. For example:

Devin: .devin/skills/video-processing-scripts/
Claude Code: .claude/skills/video-processing-scripts/

The skill folder is available in both repositories:

Git (guru/Video-Processing-Scripts): the skill folder.
SVN (project Video Processing Scripts): the skill folder.

Note that both repositories skill folder contains SKILL.md and the markdown documentation pages required by the skill.

Notes

All scripts require PowerShell 7+ (use pwsh.exe)
File extensions (.mp4, .png) are automatically added if not provided
Paths can be absolute or relative to current directory
Use .skip.mp4 extension to exclude files from batch processing
Backup files (.bak.mp4) are automatically skipped in batch operations

Troubleshooting

Error: "Video file not found"

Check that the file path is correct
Ensure file exists at specified location
Use absolute paths if relative paths aren't working

Error: "ffmpeg failed" or "ffprobe failed"

Verify ffmpeg and ffprobe are installed and in PATH
Check that the video file is not corrupted
Ensure sufficient disk space for output

Error: "Frame index out of range"

Use Get-FramesCount.ps1 to check valid frame range
Frame indices are 0-based (first frame is 0)