AI 影片生成：JSON 提示真比自然語言更優？

隨著近期 Google Veo 3 的熱議，許多用戶開始改用 JSON 格式撰寫提示。有些人聲稱這種「結構化」的方法比傳統的自然語言提示能產生更佳的影片輸出，引發了不少討論。那麼，JSON 是什麼？它真的比較優越嗎？

什麼是 JSON？

JSON（JavaScript Object Notation）是一種輕量級的資料交換格式，使用鍵值對表示資料，例如：

{
  "scene": "Neo-Tokyo 2077, neon-lit skyscrapers with holographic billboards, flying cars zipping through rain-slicked streets. A cybernetic detective chases a rogue AI through an abandoned data hub.",
  "style": "Cyberpunk 2077 meets Blade Runner, high-contrast neon lighting, gritty textures, glitch effects",
  "length": "45 seconds",
  "resolution": "4K",
  "camera": {
    "shots": [
      {"type": "dolly", "direction": "forward", "duration": "8s", "focus": "detective's cybernetic eye"},
      {"type": "360_spin", "speed": "fast", "duration": "6s", "focus": "rogue AI's glowing core"},
      {"type": "split_screen", "layout": "left-right", "duration": "10s", "content": ["detective's HUD", "AI's data trail"]}
    ]
  },
  "special_effects": {
    "glitch": {
      "intensity": "0.7",
      "frequency": "high",
      "color": "#FF00FF"
    },
    "neon_glow": {
      "radius": "20px",
      "blend_mode": "screen"
    }
  },
  "sound": {
    "background_music": "industrial techno with heavy bass drops",
    "ambient_sound": "rain pattering, hologram hums, distant sirens",
    "voice_over": "A world where humans and code blur. Find the truth before it deletes you."
  }
}

{
  "scene": "A medieval castle under siege, with fireballs and arrows flying. The camera moves through the battlefield, allowing viewers to interact with objects.",
  "style": "Unreal Engine 5 realism, dynamic lighting, particle-rich combat. Inspired by The Witcher 3 and Game of Thrones.",
  "length": "90 seconds",
  "resolution": "8K",
  "camera": {
    "shots": [
      {"type": "first-person", "movement": "free", "duration": "30s"},
      {"type": "third-person", "distance": "10m", "angle": "45°", "duration": "30s"},
      {"type": "vr_360", "interactivity": ["pick-up sword", "block arrow"], "duration": "30s"}
    ]
  },
  "special_effects": {
    "physics_engine": {
      "gravity": "0.8",
      "collision": "true",
      "ragdoll": "soldiers"
    },
    "weather_system": {
      "type": "thunderstorm",
      "wind_speed": "20m/s",
      "rain_intensity": "high"
    }
  },
  "sound": {
    "background_music": "epic orchestral battle theme",
    "ambient_sound": "sword clashes, war cries, thunder rumbles",
    "interactive_sound": {
      "pick-up": "metal clang",
      "block": "shield impact"
    }
  }
}

 {
  "brand": "Chronos Elite",
  "core_message": "Time is an art---crafted, precise, timeless",
  "style": "Hugo Boss meets A24 cinematography: warm golden hour lighting, ultra-smooth tracking shots, 120fps slow motion for detail",
  "total_length": "60 seconds",
  "resolution": "8K HDR",
  "aspect_ratio": "2.39:1 (cinematic widescreen)",
  "color_grading": {
    "primary_tone": "deep navy + gold accents",
    "contrast": "high",
    "saturation": "muted (70%)"
  },
  "scenes": [
    {
      "scene_id": "01_craftsmanship",
      "duration": "15s",
      "content": "Master watchmaker's hands assembling a chronograph movement---close-ups of gears, sapphire crystal, and 18k gold case",
      "camera": {
        "shots": [
          {"type": "macro", "focus": "tweezers placing a micro-gear", "duration": "5s"},
          {"type": "tracking", "direction": "left-to-right", "subject": "watch face engraving", "speed": "ultra-slow"}
        ]
      },
      "brand_elements": ["logo embossed on case back", "signature blue dial"],
      "sound": {
        "ambient": "soft ticking (amplified 300%)",
        "music": "cello solo (slow, melodic)"
      }
    },
    {
      "scene_id": "02_lifestyle",
      "duration": "20s",
      "content": "Business executive in tailored suit checking the watch during a sunset meeting on a rooftop---city skyline in background",
      "camera": {
        "shots": [
          {"type": "over-shoulder", "focus": "watch on wrist as hand gestures", "duration": "8s"},
          {"type": "wide_angle", "zoom": "out", "focus": "executive with watch catching golden light"}
        ]
      },
      "brand_elements": ["watch strap matching suit texture", "date window reflecting sunset"],
      "sound": {
        "ambient": "distant city buzz",
        "music": "piano + violin (building to crescendo)"
      }
    },
    {
      "scene_id": "03_legacy",
      "duration": "15s",
      "content": "Vintage Chronos Elite watch from 1960s placed next to 2024 model---both glowing under museum-like lighting",
      "camera": {
        "shots": [
          {"type": "top-down", "rotate": "360°", "speed": "slow", "focus": "side-by-side watches"},
          {"type": "close-up", "zoom": "in", "focus": "matching serial number engraving"}
        ]
      },
      "brand_elements": ["heritage logo (1960s) vs modern logo", "tagline: 'Timeless since 1948'"],
      "sound": {
        "ambient": "silence (emphasizing legacy)",
        "music": "orchestral swells (emotional peak)"
      }
    },
    {
      "scene_id": "04_call_to_action",
      "duration": "10s",
      "content": "Watch displayed in luxury boutique window---text overlay: 'Craft Your Legacy'",
      "camera": {
        "shots": [
          {"type": "dolly", "direction": "forward", "focus": "watch in window", "end_on": "logo animation"}
        ]
      },
      "brand_elements": ["full logo on screen", "website URL: www.chronoselite.com"],
      "sound": {
        "voice_over": "Chronos Elite: Where time becomes art.",
        "music": "fade to soft piano chord"
      }
    }
  ],
  "api_integration": {
    "dynamic_fields": ["[current_year]", "[limited_edition_name]"],
    "output_format": "MP4 + XML project file (for post-editing)"
  }
}

JSON vs. 自然語言：哪個更強？

AI 模型本身並不「偏好」任一格式。不管你輸入自然語言還是 JSON，模型都會將其轉換成 token 並以相似方式處理。如果你的提示清晰且條理分明，自然語言同樣可以有效。

然而，JSON 在某些特定場景下確實有亮點：

JSON 的優點：

• 更好的控制：你可以明確定義場景、風格、長度等，減少 AI 的非預期「自由發揮」。
• 適合複雜任務：多場景腳本或產品規格影片更適合使用結構化格式。
• 輕鬆批量與模板重用：使用一個 JSON 模板就能高效產生多個變體。
• 無縫整合：開發者可以程式化地生成與解析 JSON 提示，非常適合自動化工作流程。

JSON 的缺點：

• 學習曲線較陡：許多用戶不熟悉 JSON 語法，可能會感到困難。
• 限制創意：其剛性會抑制 AI 的想像力發揮。
• 編輯麻煩：調整 JSON 提示較為繁複且易有語法錯誤，比起簡單修改自然語言句子更費工夫。

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何時使用 JSON 或自然語言

• 如果你處理複雜、多步驟任務──品牌影片、多場景腳本或需要 API 驅動的工作流程，使用 JSON。
• 如果是創意、具表現力或對話式場景──如插畫提示、故事敘述或對話驅動輸出（例如 ChatGPT），請堅持使用自然語言。

最後心得

JSON 並非神奇升級──它只是一種清晰結構化提示的方式。當你需要一致性、內容控制或自動化時，它很適合；但對於追求靈活性與即興創作的創作者來說，精心設計的自然語言通常更強大。

真正的關鍵不在格式──而在清晰度。無論你用 JSON 還是純語言，最重要的是清楚表達你的想法。格式只是工具，你的創造力與條理思考，才是成敗關鍵。