camera-mcp

camera-mcp

MCP server that exposes local webcam capabilities to Claude via ffmpeg/DirectShow, enabling listing cameras, taking photos, and recording/stopping videos on Windows.

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README

camera-mcp

通过 ffmpeg / DirectShow,把本机摄像头能力暴露给 Claude 的 MCP server。

让 Claude 可以直接:列出摄像头 → 拍照 → 录像 → 停止录像,全程本地处理,文件落到磁盘。


功能

工具 说明
list_cameras 列出本机所有 DirectShow 视频设备
take_photo 用指定摄像头拍一张 JPEG
start_recording 后台开始录像(libx264 / mp4),返回 recording_id
stop_recording 优雅停止录像(写 q → ffmpeg 自动收尾,写入 moov 索引)
list_recordings 列出当前所有进行中的录像

环境要求

  • Windows(用了 DirectShow,Linux/macOS 需要换 avfoundation / v4l2
  • Node.js ≥ 18
  • ffmpeg(在 PATH 里,或自行改成绝对路径)
# Windows 用 winget 装 ffmpeg
winget install ffmpeg

安装 & 构建

cd camera
npm install
npm run build

构建产物在 dist/index.js,可执行项 camera-mcp


配置到 Claude Code

~/.claude/mcp.json(或项目级 .mcp.json)里加:

{
  "mcpServers": {
    "camera": {
      "command": "node",
      "args": ["C:/Users/hj158/mcp-servers/camera/dist/index.js"]
    }
  }
}

启动后用 claude mcp list 应该能看到 camera: ... √ Connected


使用示例

帮我拍一张照片

Claude 会调:

take_photo(device="HD Webcam", path="./photos/test.jpg", quality=2)

用 ToDesk Camera 录一段 30 秒视频

start_recording(device="ToDesk Camera", path="./videos/demo.mp4")
# → recording_id: rec_xxxxxxxx_1
# ... 30 秒后 ...
stop_recording(recording_id="rec_xxxxxxxx_1")

工具参数

take_photo

参数 类型 必填 说明
device string 设备名(必须来自 list_cameras
path string 保存路径,默认 ./photos/photo-{timestamp}.jpg
quality number JPEG 质量 1-31,数字越小质量越高,默认 2

start_recording

参数 类型 必填 说明
device string 设备名
path string 默认 ./videos/video-{timestamp}.mp4
resolution string 默认 1280x720
fps number 1-60,默认 30

stop_recording

参数 类型 必填 说明
recording_id string start_recording 返回的 ID

工作原理

  • 设备枚举:调 ffmpeg -list_devices true -f dshow -i dummy,正则匹配 "..." (video)
  • 拍照:spawn ffmpeg,-frames:v 1 -q:v <quality> 截单帧
  • 录像:spawn ffmpeg 保持长连接,用 Map<recording_id, ChildProcess> 跟踪;停止时往 stdin 写 q,让 ffmpeg 走正常退出流程(否则 mp4 moov 索引缺失,很多播放器打不开)

已知限制

  • Windows-only(DirectShow);跨平台需要按平台分支选择 input format
  • 多进程隔离:每次拍照/录像都新 spawn 一个 ffmpeg,启动开销约 300-500ms
  • 录像启动 500ms 后才检查 exit code,极端情况下启动失败可能要等一下才能发现

License

MIT

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