Video Merger

OrganizationPopular

TokenRhythm

video-merger

Concatenate a directory of numbered MP4 segments (1_*.mp4, 2_*.mp4, ...) into one MP4 with optional fade transitions, unified resolution/fps/codec. Pure ffmpeg wrapper, no LLM. Trigger when a workflow has produced several short clips that need stitching into a final reel.

Overview

Publisher	TokenRhythm
Repository	`opensquilla`
Skill name	`video-merger`
Stars	7K
Forks	566
Bundled files	5
License	Apache-2.0
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
5 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by TokenRhythm on GitHub. Read the source before you install it.

Installation

Install the Video Merger AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
Enable the skill in any chat where you want it available.

Store

Installed

Skills

Add skills

Import one or more skills from a public GitHub folder or a local .skill or .zip archive, or SKILL.md file.

From GitHub URLFrom .skill, .zip, or SKILL.md

GitHub repo or folder

https://github.com/TokenRhythm/opensquilla/tree/main/src/opensquilla/skills/bundled/video-merger

Points to a single skill folder, or any folder that contains multiple skills. Public repos only.

CancelContinue

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/TokenRhythm/opensquilla.git /tmp/opensquilla
mkdir -p .claude/skills
cp -r /tmp/opensquilla/src/opensquilla/skills/bundled/video-merger .claude/skills/video-merger

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Video Merger in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Video Merger on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Video Merger is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

video-merger — numbered-segment MP4 concatenator

Combines 1_*.mp4, 2_*.mp4, ... in numeric order into one MP4 (or multiple ~60s chunks), with optional fade transitions, codec/resolution/ fps normalisation.

Inputs (`with:`)

key	required	default	notes
`input_dir`	yes	—	Directory containing `\d+_*.mp4` segments.
`output_path`	yes	—	`.mp4` path (full mode) or directory (chunk mode).
`mode`	no	`full`	`full` or `chunk`.
`transition`	no	`0.5`	Fade duration in seconds. `0` disables.
`fps`	no	`24`	Target frame rate.
`crf`	no	`22`	x264 CRF (0-51, lower = better).
`preset`	no	`medium`	x264 preset.

For chunk mode, pass chunk_duration directly to the script — the meta engine entrypoint above does not template it; use a direct shell call when chunking is needed.

Dependencies

ffmpeg ≥ 5.0
ffprobe
Python 3.8+
No Python packages required beyond stdlib.

Install hints (or just run the bundled installer):

OS	One-liner installer	Manual
Windows (PowerShell)	`pwsh -ExecutionPolicy Bypass -File install.ps1`	`winget install Gyan.FFmpeg` / `choco install ffmpeg` / `scoop install ffmpeg`
macOS	`bash install.sh`	`brew install ffmpeg`
Debian/Ubuntu	`bash install.sh`	`sudo apt install ffmpeg`

The Windows installer (install.ps1) defaults to winget but accepts $env:OPENSQUILLA_FFMPEG_INSTALLER="choco"|"scoop"|"skip" to switch backends. It prints the absolute ffmpeg/ffprobe paths after install so you can pass them to merge.py via --ffmpeg-path / --ffprobe-path when subprocess PATH inheritance is unreliable.

Filename ordering contract

The script picks files matching ^\d+_.*\.mp4$ and sorts by the leading integer. Producers must save segments as 1_shot.mp4, 2_shot.mp4, 3_shot.mp4, etc. The meta-short-drama workflow already follows this.

Output

Stdout: progress lines and the final output path. Non-zero exit on ffmpeg failure.

Failure modes

未找到ffmpeg → install ffmpeg, ensure ffmpeg on PATH or pass --ffmpeg-path directly.
未找到符合命名规则...的MP4文件 → ensure segments are \d+_*.mp4.
Mixed resolutions / fps: handled automatically when --resolution is set; otherwise ffmpeg preserves originals (no normalisation).

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Video Merger AI skill do?

Why use Video Merger on TypingMind?

Because you install it once and use it with any model. Video Merger is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Video Merger in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/TokenRhythm/opensquilla/tree/main/src/opensquilla/skills/bundled/video-merger. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Video Merger?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Video Merger?

As many as you like. As long as a model supports skills, you can use Video Merger with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Video Merger AI skill free?

Yes. It is published on GitHub by TokenRhythm under the Apache-2.0 license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

video-merger — numbered-segment MP4 concatenator

Inputs (with:)

Dependencies

Filename ordering contract

Output

Failure modes

Bundled files

Frequently asked questions

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Inputs (`with:`)