Agent skill

Ffmpeg Video Editing

by benchflow-ai in benchflow-ai/skillsbench

Cut, trim, concatenate, and split video files - basic video editing operations

Apache-2.0Auto-check passedMedia & Creative

Install Ffmpeg Video Editing

skills CLI

$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install benchflow-ai/skillsbench ffmpeg-video-editing --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .claude/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing .claude/skills/ffmpeg-video-editing && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "ffmpeg-video-editing" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing into .claude/skills/ffmpeg-video-editing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ffmpeg-video-editing", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install benchflow-ai/skillsbench ffmpeg-video-editing --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .agents/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing .agents/skills/ffmpeg-video-editing && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "ffmpeg-video-editing" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing into .agents/skills/ffmpeg-video-editing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ffmpeg-video-editing", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install benchflow-ai/skillsbench ffmpeg-video-editing --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing .cursor/skills/ffmpeg-video-editing && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "ffmpeg-video-editing" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing into .cursor/skills/ffmpeg-video-editing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ffmpeg-video-editing", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/benchflow-ai/skillsbench.git --path tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install benchflow-ai/skillsbench ffmpeg-video-editing --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing .gemini/skills/ffmpeg-video-editing && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "ffmpeg-video-editing" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing into .gemini/skills/ffmpeg-video-editing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ffmpeg-video-editing", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install benchflow-ai/skillsbench ffmpeg-video-editing

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .github/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing .github/skills/ffmpeg-video-editing && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "ffmpeg-video-editing" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing into .github/skills/ffmpeg-video-editing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ffmpeg-video-editing", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install benchflow-ai/skillsbench ffmpeg-video-editing --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/benchflow-ai/skillsbench.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing .opencode/skills/ffmpeg-video-editing && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "ffmpeg-video-editing" agent skill from https://github.com/benchflow-ai/skillsbench/tree/main/tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing into .opencode/skills/ffmpeg-video-editing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ffmpeg-video-editing", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: ffmpeg-video-editing
GitHub stars: 1.8k
Token cost: ~628 tokens
SKILL.md length: 103 words
Files: 1
Skills in repo: 189
Repo updated: Jul 23, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Cut, trim, concatenate, and split video files - basic video editing operations

Tasks that involve Video production
SKILL.md covers When to Use, Cutting and Trimming, Precise Cutting and Concatenation, plus 4 more sections
Calls ffmpeg

What it does

Ffmpeg Video Editing is an agent skill from benchflow-ai/skillsbench. Cut, trim, concatenate, and split video files - basic video editing operations

Its SKILL.md is about 630 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Video production. It works with FFmpeg. The repository describes itself as: SkillsBench evaluates how well skills work and how effective agents are at using them. The licence is Apache-2.0.

When your agent uses it

Tasks that involve Video production

Example prompts

“/ffmpeg-video-editing”

What it can do on your machine

Read from SKILL.md and the folder at commit 9a1f4dd. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- ffmpeg
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Ffmpeg Video Editing loads about 628 tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 103 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~25
When it runs · the whole SKILL.md, loaded when a task matches: ~628

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from benchflow-ai/skillsbench at commit 9a1f4dd, republished under its Apache-2.0 licence (© benchflow-ai). 103 words, ~628 tokens.

Download SKILL.mdSave it as .claude/skills/ffmpeg-video-editing/SKILL.md (or your agent's skills folder).

name: ffmpeg-video-editing
description: Cut, trim, concatenate, and split video files - basic video editing operations

FFmpeg Video Editing Skill

Basic video editing operations: cutting, trimming, concatenating, and splitting videos.

When to Use

Cut segments from video
Trim video length
Concatenate multiple videos
Split video into parts
Extract specific time ranges

Cutting and Trimming

bash

# Cut from 10s to 30s (using -ss and -to)
ffmpeg -ss 00:00:10 -to 00:00:30 -i input.mp4 -c copy output.mp4

# Cut from 10s for 20 seconds duration
ffmpeg -ss 00:00:10 -t 20 -i input.mp4 -c copy output.mp4

# First 60 seconds
ffmpeg -t 60 -i input.mp4 -c copy output.mp4

# Last 30 seconds (need duration first)
ffmpeg -sseof -30 -i input.mp4 -c copy output.mp4

Precise Cutting

bash

# With re-encoding (more precise)
ffmpeg -ss 00:00:10 -i input.mp4 -t 20 -c:v libx264 -c:a aac output.mp4

# Keyframe-accurate (faster, may be less precise)
ffmpeg -ss 00:00:10 -i input.mp4 -t 20 -c copy output.mp4

Concatenation

Method 1: File List (Recommended)

bash

# Create list.txt file:
# file 'video1.mp4'
# file 'video2.mp4'
# file 'video3.mp4'

ffmpeg -f concat -safe 0 -i list.txt -c copy output.mp4

Method 2: Same Codec Files

bash

# If all videos have same codec/format
ffmpeg -i "concat:video1.mp4|video2.mp4|video3.mp4" -c copy output.mp4

Method 3: Re-encode (Different Codecs)

bash

# Re-encode for compatibility
ffmpeg -f concat -safe 0 -i list.txt -c:v libx264 -c:a aac output.mp4

Splitting Video

bash

# Split into 60-second segments
ffmpeg -i input.mp4 -c copy -f segment -segment_time 60 \
  -reset_timestamps 1 output_%03d.mp4

# Split at specific timestamps
ffmpeg -i input.mp4 -ss 00:00:00 -t 00:01:00 -c copy part1.mp4
ffmpeg -i input.mp4 -ss 00:01:00 -t 00:01:00 -c copy part2.mp4

Extract Segment with Re-encoding

bash

# When you need to change quality/codec
ffmpeg -ss 00:00:10 -i input.mp4 -t 20 \
  -c:v libx264 -crf 23 -c:a aac -b:a 192k output.mp4

Multiple Segments

bash

# Extract multiple segments
ffmpeg -i input.mp4 \
  -ss 00:00:10 -t 00:00:05 -c copy segment1.mp4 \
  -ss 00:01:00 -t 00:00:10 -c copy segment2.mp4

Notes

Use -c copy for speed (no re-encoding)
-ss before -i is faster but less precise
-ss after -i is more precise but slower
Concatenation requires same codec/format for -c copy
Use file list method for best concatenation results

Files

Just SKILL.md in tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing of benchflow-ai/skillsbench.

Open the folder on GitHubat commit 9a1f4dd

Compare with similar skills

Ffmpeg Video Editing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Ffmpeg Video Editing compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Ffmpeg Video Editing this skillbenchflow-ai/skillsbench	1.8k	—	~628	Automated safety check: Pass	Apache-2.0	2 mo ago
Video Understandcalesthio/OpenMontage	66k	—	~841	Automated safety check: Pass	AGPL-3.0	5 days ago
HyperFrames Video Entry Pointheygen-com/hyperframes	59k	3 repos	~5.2k	Automated safety check: Pass	Apache-2.0	today
Video Shotseternityspring/reelbench-skills	872	1 repos	~1.8k	Automated safety check: Notes	Apache-2.0	18 days ago
Mobile Demo Film Editorsuperset-sh/superset	15k	—	~1.8k	Automated safety check: Pass	Custom licence	today
Video Editcalesthio/OpenMontage	66k	—	~855	Automated safety check: Notes	AGPL-3.0	5 days ago

Similar skills

Video Understand
calesthio/OpenMontage
Understand video content locally using ffmpeg frame extraction and Whisper transcription.
66k GitHub stars~841 tokensUpdated 5 days ago
Media & CreativeAuto-check passed
HyperFrames Video Entry Point
heygen-com/hyperframes
Entry point for making, editing and rendering videos from HTML compositions with HyperFrames, routing each request to the right workflow.
59k GitHub starsUsed in 3 repos~5.2k tokens
Media & CreativeAuto-check passed
Video Shots
eternityspring/reelbench-skills
拉片：把一条成片拆成逐镜头的分析表——每个镜头的时长、景别、类别、运镜、画面. An agent skill from eternityspring/reelbench-skills.
872 GitHub starsUsed in 1 repo~1.8k tokens
Media & CreativeAuto-check: notes
Mobile Demo Film Editor
superset-sh/superset
Edits real mobile screen recordings into a configurable demo video with phone framing, title cards, cutaways and an end card, using a bundled renderer.
15k GitHub stars~1.8k tokensUpdated today
Media & CreativeAuto-check passed
Video Edit
calesthio/OpenMontage
Edit videos locally using ffmpeg. An agent skill from calesthio/OpenMontage.
66k GitHub stars~855 tokensUpdated 5 days ago
Media & CreativeAuto-check: notes
Lemo-Opuscar Short Film Director
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Questions about Ffmpeg Video Editing

What does Ffmpeg Video Editing do?

Cut, trim, concatenate, and split video files - basic video editing operations. Ffmpeg Video Editing is an agent skill from benchflow-ai/skillsbench.

When should I use Ffmpeg Video Editing?

Ffmpeg Video Editing fits situations like: tasks that involve Video production.

How do I install Ffmpeg Video Editing in Claude Code?

Run `npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a claude-code`. Or copy the skill folder (tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing in benchflow-ai/skillsbench) into .claude/skills/ffmpeg-video-editing in your project. Claude Code loads it when a task matches its description.

How do I install Ffmpeg Video Editing in Codex?

Run `npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a codex`. Or copy the skill folder (tasks/multilingual-video-dubbing/environment/skills/ffmpeg-video-editing in benchflow-ai/skillsbench) into .agents/skills/ffmpeg-video-editing in your project. Codex loads it when a task matches its description.

Can I use Ffmpeg Video Editing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add benchflow-ai/skillsbench --skill ffmpeg-video-editing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ffmpeg-video-editing, .gemini/skills/ffmpeg-video-editing, .github/skills/ffmpeg-video-editing and .opencode/skills/ffmpeg-video-editing in your project.

What does Ffmpeg Video Editing need to run?

Going by SKILL.md and its folder, Ffmpeg Video Editing needs the command-line tools its instructions call (ffmpeg).

Does Ffmpeg Video Editing access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Ffmpeg Video Editing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Ffmpeg Video Editing use?

Ffmpeg Video Editing is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Ffmpeg Video Editing use?

About 628 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Ffmpeg Video Editing?

Skills that share tags, products or a category with Ffmpeg Video Editing: Video Understand (calesthio/OpenMontage, 66k stars), HyperFrames Video Entry Point (heygen-com/hyperframes, 59k stars), Video Shots (eternityspring/reelbench-skills, 872 stars) and Mobile Demo Film Editor (superset-sh/superset, 15k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ffmpeg Video Editing?

benchflow-ai (a GitHub organization) maintains it in benchflow-ai/skillsbench, which has 1,834 GitHub stars. The repository holds 189 skills in this directory. The repository was last updated on July 23, 2026.

Source: benchflow-ai/skillsbench on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Ffmpeg Video Editing

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

FFmpeg Video Editing Skill

When to Use

Cutting and Trimming

Precise Cutting

Concatenation

Method 1: File List (Recommended)

Method 2: Same Codec Files

Method 3: Re-encode (Different Codecs)

Splitting Video

Extract Segment with Re-encoding

Multiple Segments

Notes

Files

Compare with similar skills

Similar skills

More from benchflow-ai/skillsbench

Related

Questions about Ffmpeg Video Editing