Can it trim or cut video segments?

Yes. The skill can trim or cut video segments using ffmpeg.

Can it concatenate multiple clips?

Yes. It can concatenate multiple clips into one video.

Can it resize video for social platforms?

Yes. It can resize video, including sizes suited to social platforms.

Can it extract or replace audio?

Yes. It can extract audio from a video or replace the audio track.

Does it need ffmpeg installed?

Yes. The skill edits videos locally using ffmpeg, so ffmpeg must be installed on the machine where the agent runs.

Video Edit

SkillMedia

The video edit skill lets an AI agent edit videos locally using ffmpeg. It handles trimming, concatenating, resizing, speed changes, overlays, audio extraction, compression, and format conversion. Use it when you want an agent to carry out common video editing tasks on files on your machine.

Use Video Edit in Claude, ChatGPT or Ahel Desktop

Free. Sign in, add Video Edit and connect your AI. About a minute.

Claude ChatGPT Ahel Desktop

Also: Claude Code · Cursor · Codex

Then ask your AI: use the Video Edit skill

Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Account requirements not reviewed. Check the skill instructions before use; ahel provides instructions and does not run this skill.

No other account needed.

Install ffmpeg on the machine where the agent runs.

Video EditStart free

What your AI can do with it

Trim or cut video segments
Concatenate multiple clips
Resize video for social platforms
Extract or replace audio
Compress video
Convert video between formats

Getting started

Install ffmpeg on the machine where the agent runs.
Make the video edit skill available to your agent.
Point the agent at the video files you want to edit.
Describe the edit you want, such as trimming or resizing.

What this skill tells your AI

The instructions your AI receives, as published by calesthio/openmontage in .agents/skills/video-edit/SKILL.md and read by ahel’s review.

Edit videos locally by running ffmpeg/ffprobe directly. No wrapper scripts needed.

Prerequisites

Install ffmpeg (includes ffprobe):

# macOS
brew install ffmpeg

# Ubuntu/Debian
sudo apt update && sudo apt install -y ffmpeg

# Verify
ffmpeg -version && ffprobe -version

Quick Reference

Get video info

ffprobe -v quiet -print_format json -show_format -show_streams video.mp4

Trim

ffmpeg -y -ss 00:00:30 -to 00:01:45 -i video.mp4 -c copy trimmed.mp4

Concatenate clips

# 1. Create a file list
printf "file '%s'\n" clip1.mp4 clip2.mp4 clip3.mp4 > list.txt

# 2. Concat with stream copy
ffmpeg -y -f concat -safe 0 -i list.txt -c copy joined.mp4

Resize for platform

ffmpeg -y -i video.mp4 \
  -vf "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:black" \
  -c:a copy tiktok.mp4

Change speed

# 2x faster
ffmpeg -y -i video.mp4 -filter:v "setpts=0.5*PTS" -filter:a "atempo=2.0" fast.mp4

# 0.5x (slow motion)
ffmpeg -y -i video.mp4 -filter:v "setpts=2.0*PTS" -filter:a "atempo=0.5" slow.mp4

Extract audio

ffmpeg -y -i video.mp4 -vn -acodec libmp3lame audio.mp3

Replace audio

ffmpeg -y -i video.mp4 -i audio.mp3 -c:v copy -map 0:v:0 -map 1:a:0 -shortest output.mp4

Compress

ffmpeg -y -i video.mp4 -crf 23 -preset medium -c:a copy compressed.mp4

Convert format

ffmpeg -y -i video.mov output.mp4

Add image overlay

# Logo in top-right corner
ffmpeg -y -i video.mp4 -i logo.png \
  -filter_complex "overlay=W-w-10:10" -c:a copy watermarked.mp4

Platform Presets

Platform	Resolution	Scale + pad filter
TikTok	1080 x 1920	`scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:black`
YouTube	1920 x 1080	`scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:black`
Instagram	1080 x 1350	`scale=1080:1350:force_original_aspect_ratio=decrease,pad=1080:1350:(ow-iw)/2:(oh-ih)/2:black`
Square	1080 x 1080	`scale=1080:1080:force_original_aspect_ratio=decrease,pad=1080:1080:(ow-iw)/2:(oh-ih)/2:black`
Twitter/X	1920 x 1080	`scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:black`

Use the filter with: ffmpeg -y -i input.mp4 -vf "<filter>" -c:a copy output.mp4

Tips

Always use -y to overwrite output without prompting.
Use -c copy when you only need to cut/join (no re-encoding, very fast).
Lower CRF = better quality, larger file. Range 18-28 is typical; 23 is the default.
For detailed recipes and flag explanations, see references/operations.md.

Signals

GitHub stars: 62k
Forks: 8k
Last commit: Sep 2026

ahel review

K1binfo
installs-packages

Automated review, not a security audit. Ruleset v1+k2.

Questions

Can it trim or cut video segments?: Yes. The skill can trim or cut video segments using ffmpeg.
Can it concatenate multiple clips?: Yes. It can concatenate multiple clips into one video.
Can it resize video for social platforms?: Yes. It can resize video, including sizes suited to social platforms.
Can it extract or replace audio?: Yes. It can extract audio from a video or replace the audio track.
Does it need ffmpeg installed?: Yes. The skill edits videos locally using ffmpeg, so ffmpeg must be installed on the machine where the agent runs.

Advanced

Item type: skill
Key: openmontage-video-edit
Source: github.com/calesthio/openmontage

github.com/calesthio/openmontage