How do I install the Ffmpeg CLI skill?

Run npx skillmds@latest add modbender/ffmpeg-cli in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Ffmpeg CLI safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Ffmpeg CLI?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Ffmpeg CLI free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Ffmpeg CLI?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Ffmpeg CLI by modbender — Agent Skill

Name: Ffmpeg CLI
Rating: 4.2 (5 reviews)
Author: modbender

Ffmpeg CLI

Comprehensive video/audio processing with FFmpeg. Use for: (1) Video transcoding and format conversion, (2) Cutting and merging clips, (3) Audio extraction and manipulation, (4) Thumbnail and GIF generation, (5) Resolution scaling and quality adjustment, (6) Adding subtitles or watermarks, (7) Speed adjustment (slow/fast motion), (8) Color correction and filters.

modbender Updated Sep 9, 2026 12 repo stars

File contents

FFmpeg CLI

Quick Reference

Task	Command
Cut video	`{baseDir}/scripts/cut.sh -i <input> -s <start> -e <end> -o <output>`
Merge clips	`{baseDir}/scripts/merge.sh -o <output> <file1> <file2> ...`
Extract audio	`{baseDir}/scripts/extract-audio.sh -i <video> -o <output.mp3>`
Generate thumbnail	`{baseDir}/scripts/thumb.sh -i <video> -t <timestamp> -o <out.jpg>`
Create GIF	`{baseDir}/scripts/gif.sh -i <video> -s <start> -e <end> -o <out.gif>`
Convert format	`{baseDir}/scripts/convert.sh -i <input> -o <output.mp4>`
Change speed	`{baseDir}/scripts/speed.sh -i <input> -r <0.5-2.0> -o <output>`
Add watermark	`{baseDir}/scripts/watermark.sh -i <video> -w <image> -o <output>`

Scripts

cut.sh - Cut video segment

{baseDir}/scripts/cut.sh -i video.mp4 -s 00:01:30 -e 00:02:45 -o clip.mp4

merge.sh - Concatenate videos

{baseDir}/scripts/merge.sh -o merged.mp4 part1.mp4 part2.mp4 part3.mp4

extract-audio.sh - Pull audio track

{baseDir}/scripts/extract-audio.sh -i video.mp4 -o audio.mp3

thumb.sh - Extract frame as image

{baseDir}/scripts/thumb.sh -i video.mp4 -t 00:00:15 -o frame.jpg

gif.sh - Convert clip to GIF

{baseDir}/scripts/gif.sh -i video.mp4 -s 00:00:10 -e 00:00:15 -o clip.gif

convert.sh - Transcode to new format

{baseDir}/scripts/convert.sh -i input.avi -o output.mp4

speed.sh - Adjust playback speed

{baseDir}/scripts/speed.sh -i video.mp4 -r 2.0 -o fast.mp4  # 2x speed
{baseDir}/scripts/speed.sh -i video.mp4 -r 0.5 -o slow.mp4  # 0.5x speed

watermark.sh - Overlay image watermark

{baseDir}/scripts/watermark.sh -i video.mp4 -w logo.png -o output.mp4

Notes

All scripts support common video formats (mp4, avi, mov, mkv, webm, etc.)
Output quality is optimized for balanced file size and clarity
Use -h or no args to see script usage

---name: ffmpeg-clidescription: Comprehensive video/audio processing with FFmpeg. Use for: (1) Video transcoding and format conversion, (2) Cutting and merging clips, (3) Audio extraction and manipulation, (4) Thumbnail and GIF generation, (5) Resolution scaling and quality adjustment, (6) Adding subtitles or watermarks, (7) Speed adjustment (slow/fast motion), (8) Color correction and filters.--- # FFmpeg CLI ## Quick Reference | Task | Command | |------|---------| | Cut video | `{baseDir}/scripts/cut.sh -i <input> -s <start> -e <end> -o <output>` | | Merge clips | `{baseDir}/scripts/merge.sh -o <output> <file1> <file2> ...` | | Extract audio | `{baseDir}/scripts/extract-audio.sh -i <video> -o <output.mp3>` | | Generate thumbnail | `{baseDir}/scripts/thumb.sh -i <video> -t <timestamp> -o <out.jpg>` | | Create GIF | `{baseDir}/scripts/gif.sh -i <video> -s <start> -e <end> -o <out.gif>` | | Convert format | `{baseDir}/scripts/convert.sh -i <input> -o <output.mp4>` | | Change speed | `{baseDir}/scripts/speed.sh -i <input> -r <0.5-2.0> -o <output>` | | Add watermark | `{baseDir}/scripts/watermark.sh -i <video> -w <image> -o <output>` | ## Scripts ### cut.sh - Cut video segment ```bash {baseDir}/scripts/cut.sh -i video.mp4 -s 00:01:30 -e 00:02:45 -o clip.mp4 ``` ### merge.sh - Concatenate videos ```bash {baseDir}/scripts/merge.sh -o merged.mp4 part1.mp4 part2.mp4 part3.mp4 ``` ### extract-audio.sh - Pull audio track ```bash {baseDir}/scripts/extract-audio.sh -i video.mp4 -o audio.mp3 ``` ### thumb.sh - Extract frame as image ```bash {baseDir}/scripts/thumb.sh -i video.mp4 -t 00:00:15 -o frame.jpg ``` ### gif.sh - Convert clip to GIF ```bash {baseDir}/scripts/gif.sh -i video.mp4 -s 00:00:10 -e 00:00:15 -o clip.gif ``` ### convert.sh - Transcode to new format ```bash {baseDir}/scripts/convert.sh -i input.avi -o output.mp4 ``` ### speed.sh - Adjust playback speed ```bash {baseDir}/scripts/speed.sh -i video.mp4 -r 2.0 -o fast.mp4 # 2x speed {baseDir}/scripts/speed.sh -i video.mp4 -r 0.5 -o slow.mp4 # 0.5x speed ``` ### watermark.sh - Overlay image watermark ```bash {baseDir}/scripts/watermark.sh -i video.mp4 -w logo.png -o output.mp4 ``` ## Notes - All scripts support common video formats (mp4, avi, mov, mkv, webm, etc.) - Output quality is optimized for balanced file size and clarity - Use `-h` or no args to see script usage

Frequently asked questions