Create a 'find-best-thumbnails' job

{
  "parameters": {
    "asset_id": "mux_asset_123abc",
    "max_thumbnails": 3,
    "update_asset_thumbnail": true,
    "output_steering": {
      "scope": {
        "start_time": 30,
        "end_time": 180
      },
      "selection_strategy": "campaign_thumbnail",
      "scoring_priorities": [
        "composition",
        "brand_fit"
      ]
    }
  }
}

{
  "data": {
    "id": "rjob_example",
    "workflow": "find-best-thumbnails",
    "status": "completed",
    "units_consumed": 100,
    "created_at": 1791302400,
    "updated_at": 1791302460,
    "parameters": {
      "asset_id": "mux_asset_123abc",
      "max_thumbnails": 1
    },
    "outputs": {
      "best_thumbnails": [
        {
          "timestamp_ms": 23000,
          "subscores": {
            "focus": 0.9,
            "face_or_action": 0.8,
            "composition": 0.9,
            "contrast_color": 0.8,
            "brand_fit": 0.7
          },
          "overall": 0.82,
          "description": "A presenter demonstrating the product against a clear background.",
          "alt_text": "Presenter holding the product toward the camera."
        }
      ]
    }
  }
}