# Media Processing

> Inspect, trim, transcode and extract audio or video with FFmpeg.

- Skill: `felinics/media-processing` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add felinics/media-processing`
- Raw SKILL.md: https://api.skillmd.com/api/skills/felinics/media-processing/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: felinics (https://skillmd.com/u/felinics)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/felinics/media-processing

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# Media Processing

## Inspect before converting
Run `ffprobe -v error -show_format -show_streams -of json <input>` to identify codecs, duration, streams and dimensions. Keep the source file intact and write to a separate output path.

## Common operations
Use `ffmpeg -i <input> -vn <audio-output>` to extract audio; `ffmpeg -i <input> -vf fps=1 <frame-pattern>` for frame sampling. For trimming, choose stream copy when keyframe-aligned cuts are acceptable, or re-encode for precise cuts. Select codecs and container based on the requested target rather than only changing the extension.

## Verify
Probe the output again and compare duration, stream count, resolution and requested format. Play or inspect representative samples when possible. Quote paths and avoid `-y` unless overwriting that output was explicitly intended.

References: https://ffmpeg.org/ffmpeg.html ; https://ffmpeg.org/ffprobe.html