{
  "task_prompt": "将积木移至中央，按按钮，再将积木放回原来的垫子。",
  "video_file": "videos/main_view/episode_000000.mp4",
  "fps": 16.666666666666668,
  "total_frames": 348,
  "frame_index_base": 0,
  "frame_range_convention": "[start_frame, end_frame)",
  "num_stages": 3,
  "stages": [
    {
      "stage_id": 0,
      "start_frame": 0,
      "end_frame": 138,
      "state_description": "Pick up the block and move it to the center position."
    },
    {
      "stage_id": 1,
      "start_frame": 138,
      "end_frame": 247,
      "state_description": "Press the button."
    },
    {
      "stage_id": 2,
      "start_frame": 247,
      "end_frame": 348,
      "state_description": "Move the block back to the front mat."
    }
  ]
}