{
  "schema_version": 2,
  "case_id": "edit_soft_push",
  "source_case_id": "table_drop_collision_baseline",
  "edit_dsl": "SET rolling_ball.initial_velocity TIMES 0.6",
  "edit_summary": "New tennis ball pushed more gently across the table. It reaches the lip at lower speed, is thrown less far off the edge, and lands short of the old ball -- no contact at all. The old ball stays exactly where it started, where the baseline moves it 0.30 m; the new ball bounces its way out across the floor alone, nine hops against the baseline's five.",
  "applies_from_frame": 1,
  "physics_diff": {
    "initial_velocity (rolling_ball)": {
      "from": 1.28,
      "to": 0.768
    },
    "timing": {
      "applies_from_frame": 1,
      "total_frames": 96,
      "unedited_frames": []
    }
  },
  "prompts": {
    "vague": {
      "zh": "从视频一开始,把新网球的初速度大小调小一些。",
      "en": "From the start of the clip, decrease the new tennis ball's initial speed."
    },
    "quantitative": {
      "zh": "从第 1 帧开始,把新网球的初速度大小减少到原来的 0.6 倍。",
      "en": "From frame 1 onwards, reduce the new tennis ball's initial speed to 0.6 times its original value."
    }
  }
}