{
  "video": "2.mp4",
  "task": "2",
  "instruction_index": 1,
  "total_instructions_for_video": 2,
  "instruction": {
    "category_label": "joint",
    "category": "J7",
    "operation": "J7.3 Time-lapse",
    "prompt_en": "Speed up the sawing action to a fast-motion time-lapse; accelerate the sawing sound, making it higher pitched and more frantic, or replace with a sped-up ambient track.",
    "audio_label": {
      "audio_op": "transform",
      "sound_type": "event_sfx",
      "edit_aspect": "temporal"
    },
    "difficulty": {
      "d1_object_localization": "easy",
      "d1_reason": "The instruction involves a time-lapse effect, which is a global video operation affecting the entire scene.",
      "d2_audio_complexity": "simple",
      "d3_cross_modal_linkage": "explicit",
      "d3_reason": "The instruction explicitly describes changes required for both the visual (time-lapse) and audio (accelerate/transform sawing sound) modalities."
    }
  }
}