# Mp4box

> mp4box — GPAC multimedia packager. Multiplex, demux, fragment, and analyze MP4 files. Essential for DASH/HLS packaging.

- Skill: `javimosch/mp4box` (Agent Skill)
- Install (CLI): `npx skillmds@latest add javimosch/mp4box`
- Raw SKILL.md: https://api.skillmd.com/api/skills/javimosch/mp4box/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: javimosch (https://skillmd.com/u/javimosch)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/javimosch/mp4box

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# mp4box
mp4box — GPAC multimedia packager. Multiplex, demux, fragment, and analyze MP4 files. Essential for DASH/HLS packaging.