Media Processing

What it does

When your agent uses it

• Converting media formats
• Encoding videos with specific codecs (H.264
• Resizing/cropping images
• Removing backgrounds from images

Example prompts

• “/media-processing”

Requirements

• Python 3
• Node.js
• A Bash shell

What it can do on your machine

Read from SKILL.md and the folder at commit c3cfae1. 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

  Ships 8 files in scripts/ (Shell, Python and JavaScript, from the files we listed), which the agent can run.

  Shell commands in SKILL.md call:

  • ffmpeg
  • magick
  • npm
  • brew
  • apt-get

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

  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

Media Processing loads about 817 tokens when it runs, and up to ~19k if it reads all its reference files. Until then it costs about 187 tokens; SKILL.md has 170 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~187

When it runs · the whole SKILL.md, loaded when a task matches

~817

With references · SKILL.md plus every file in references/, read only if the agent opens them

~19k

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

• NoteRuns commands with sudoSKILL.md:31

  sudo apt-get install ffmpeg imagemagick

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); the scripts in this folder are not scanned.

SKILL.md

The full file from ynulihao/AgentSkillOS at commit c3cfae1, republished under its MIT licence (© ynulihao). 170 words, ~817 tokens.

name

media-processing

description

Process multimedia files with FFmpeg (video/audio encoding, conversion, streaming, filtering, hardware acceleration), ImageMagick (image manipulation, format conversion, batch processing, effects, composition), and RMBG (AI-powered background removal). Use when converting media formats, encoding videos with specific codecs (H.264, H.265, VP9), resizing/cropping images, removing backgrounds from images, extracting audio from video, applying filters and effects, optimizing file sizes, creating streaming manifests (HLS/DASH), generating thumbnails, batch processing images, creating composite images, or implementing media processing pipelines. Supports 100+ formats, hardware acceleration (NVENC, QSV), and complex filtergraphs.

license

MIT

# macOS
brew install ffmpeg imagemagick
npm install -g rmbg-cli

# Ubuntu/Debian
sudo apt-get install ffmpeg imagemagick
npm install -g rmbg-cli

# Verify
ffmpeg -version && magick -version && rmbg --version

# Video: Convert/re-encode
ffmpeg -i input.mkv -c copy output.mp4
ffmpeg -i input.avi -c:v libx264 -crf 22 -c:a aac output.mp4

# Video: Extract audio
ffmpeg -i video.mp4 -vn -c:a copy audio.m4a

# Image: Convert/resize
magick input.png output.jpg
magick input.jpg -resize 800x600 output.jpg

# Image: Batch resize
mogrify -resize 800x -quality 85 *.jpg

# Background removal
rmbg input.jpg                          # Basic (modnet)
rmbg input.jpg -m briaai -o output.png  # High quality
rmbg input.jpg -m u2netp -o output.png  # Fast

© ynulihao, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 21 other files (scripts, references) in data/skill_seeds/media-processing of ynulihao/AgentSkillOS.

• SKILL.md
• references/common-workflows.md
• references/ffmpeg-encoding.md
• references/ffmpeg-filters.md
• references/ffmpeg-streaming.md
• references/format-compatibility.md
• references/imagemagick-batch.md
• references/imagemagick-editing.md
• references/rmbg-background-removal.md
• references/troubleshooting.md
• scripts/README.md
• scripts/batch-remove-background.sh
• scripts/batch_resize.py
• scripts/media_convert.py
• scripts/remove-background.sh
• scripts/remove-bg-node.js
• scripts/requirements.txt
• scripts/tests/requirements.txt
• … and 4 more

Open the folder on GitHubat commit c3cfae1