Boxed FFmpeg

该 Skill 通过 openclaw-wasm-sandbox 插件在 WASM 沙箱中运行 FFmpeg，提供 info、convert、extract-audio 三个命令，用于读取音视频信息、转换视频格式以及从视频中提取音频，处理在本地完成；使用前需安装指定版本插件，并在组件缺失时先下载 WASM 文件。

guyoung

热度 33.98

最近更新 2026-05-11 17:39:46

分类：效率依赖：MCP 服务 / 读写文件应用场景：文件转换

安装技能

复制下面的话术发给你的 Agent，它会通过 secure-skills 检索并安装该技能。

执行命令安装此 skill： npx secure-skills-cli add boxed-ffmpeg

Metadata

name: boxed-ffmpeg
description: Audio/video information extraction, format conversion, and audio extraction using FFmpeg WASM sandbox.

Boxed FFmpeg Skill

Run FFmpeg commands safely within a WASM sandbox for audio/video processing.

Triggering

Use this skill when the user says:

"ffmpeg", "media info", "get video information"
"convert video", "change video format", "格式转换"
"extract audio", "audio from video", "提取音频"
"boxed-ffmpeg"

⚠️ Required Plugin

This skill requires the openclaw-wasm-sandbox plugin version >= 0.2.0.

openclaw plugins install clawhub:openclaw-wasm-sandbox
openclaw plugins update openclaw-wasm-sandbox
openclaw gateway restart

⚠️ WASM File Required

If the WASM file does not exist, download it first:

wasm-sandbox-download({
  url: "https://raw.githubusercontent.com/guyoung/wasm-sandbox-openclaw-skills/main/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  output: "~/.openclaw/skills/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  resume: false,
  timeout: 120000
})

Tool: wasm-sandbox-run

wasm-sandbox-run({
  wasmFile: "~/.openclaw/skills/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  workDir: "<input-file-directory>",
  args: ["<COMMAND>", "<INPUT>", "<OUTPUT>"]
})

Important:

workDir must be set to the directory containing the input file
Input/output arguments are filenames only (no directory paths)

Commands

Command	Description	Arguments
`info`	Get media file information	`<INPUT>`
`convert`	Convert video format	`<INPUT> <OUTPUT>`
`extract-audio`	Extract audio from video	`<INPUT> <OUTPUT>`

Examples

Get Media Information

User says: "Get info about video.mp4" (file in workspace root)

wasm-sandbox-run({
  wasmFile: "~/.openclaw/skills/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  workDir: "/home/user/.openclaw/workspace",
  args: ["info", "video.mp4"]
})

Convert Video Format

User says: "Convert video.mp4 to AVI" (file in workspace root)

wasm-sandbox-run({
  wasmFile: "~/.openclaw/skills/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  workDir: "/home/user/.openclaw/workspace",
  args: ["convert", "video.mp4", "video.avi"]
})

Extract Audio from Video

User says: "Extract audio from video.mp4 as mp3" (file in workspace root)

wasm-sandbox-run({
  wasmFile: "~/.openclaw/skills/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  workDir: "/home/user/.openclaw/workspace",
  args: ["extract-audio", "video.mp4", "audio.mp3"]
})

Convert with Subdirectory

User says: "Convert videos/input.mp4 to videos/output.avi"

wasm-sandbox-run({
  wasmFile: "~/.openclaw/skills/boxed-ffmpeg/files/boxed-ffmpeg-component.wasm",
  workDir: "/home/user/.openclaw/workspace/videos",
  args: ["convert", "input.mp4", "output.avi"]
})

Important Notes

workDir is required — must be the directory of the input file
Input/output are filenames only — no paths, just names
Output file appears in workDir after successful execution
No network access needed — all processing is local