{
  "version": 0,
  "output": { "width": 1280, "height": 720, "fps": 30 },
  "source": { "path": "sample.mp4", "proxy": null },
  "cuts": [{ "in": 0.0, "out": 20.0 }],
  "overlays": [],
  "audio": {
    "bgm": { "gain_db": -18, "ducking": true }
  }
}