AI 驱动的网剧生成平台：从剧本到视频剪辑的全流程设计

flowchart LR
    A["用户输入创意 Prompt"] --> B["剧本生成引擎"]
    B --> C["分镜与视觉规划"]
    C --> D["素材生成工厂"]
    D --> E["视频剪辑合成"]
    E --> F["成片预览与导出"]
    G["素材库/风格库"] --> D
    H["音效与 BGM 素材"] --> E

<scene id="1" location="咖啡厅-内景">
  <action>林小米推开玻璃门，风铃响起。她扫视大厅，目光停在角落戴耳机的男生身上。</action>
  <dialogue character="林小米">是你给我发的匿名邮件？</dialogue>
  <dialogue character="陆时砚">比我想象中来得早。</dialogue>
</scene>

import openai
import json
import os
from typing import List, Dict

openai.api_key = os.getenv("OPENAI_API_KEY")

def generate_outlines(genre: str, keywords: str, model: str = "gpt-4o") -> List[Dict]:
    """创意发散：根据类型和关键词生成3个候选大纲"""
    prompt = (
        f"你是一名网剧编剧。根据类型「{genre}」和关键词「{keywords}」，"
        f"生成3个不同的短剧大纲，每个大纲包括剧名和200字剧情梗概。"
        f"以JSON数组字符串返回，格式：[{{'title':..., 'synopsis':...}}]"
    )
    response = openai.chat.completions.create(
        model=model,
        messages=[{"role": "user", "content": prompt}],
        temperature=0.9
    )
    outlines = json.loads(response.choices[0].message.content)
    return outlines

def evaluate_outlines(outlines: List[Dict], model: str = "gpt-4o") -> Dict:
    """大纲评审：扮演制片人，对每个大纲评分并选出最佳"""
    prompt = (
        f"你是一名资深制片人。请对以下3个大纲进行可行性、冲突密度、爽点数量评分（1-10分），"
        f"选出最佳并说明理由。大纲：{json.dumps(outlines, ensure_ascii=False)} "
        f"返回JSON：{{'best_index': 0, 'scores': [{{'feasibility':..., 'conflict':..., 'twist':...}}], 'reason':'...'}}"
    )
    response = openai.chat.completions.create(
        model=model,
        messages=[{"role": "user", "content": prompt}],
        temperature=0.5
    )
    evaluation = json.loads(response.choices[0].message.content)
    return evaluation

def develop_characters(selected_outline: Dict, model: str = "gpt-4o") -> List[Dict]:
    """角色开发：为选中的大纲创建角色小传"""
    prompt = (
        f"你是一名角色设计师。根据以下大纲，生成3-5个主要角色，"
        f"每个角色包含姓名、性格、口头禅、背景故事。"
        f"大纲：{json.dumps(selected_outline, ensure_ascii=False)} "
        f"返回JSON列表：[{{'name':..., 'personality':..., 'catchphrase':..., 'backstory':...}}]"
    )
    response = openai.chat.completions.create(
        model=model,
        messages=[{"role": "user", "content": prompt}],
        temperature=0.8
    )
    characters = json.loads(response.choices[0].message.content)
    return characters

def expand_script(outline: Dict, characters: List[Dict], model: str = "gpt-4o") -> str:
    """剧本扩写：生成三幕剧剧本，包含场景描述、动作与对白"""
    prompt = f"""你是一名专业编剧。根据大纲和角色信息，写出完整的三幕剧剧本。要求：
- 用XML格式输出，<scene>标签注明id和地点
- 每个场景包含<action>和<dialogue>（标注character）
- 添加duration_s和emotion属性
大纲：{json.dumps(outline, ensure_ascii=False)}
角色：{json.dumps(characters, ensure_ascii=False)}
输出示例：
<scene id="1" location="咖啡厅-内景" duration_s=5 emotion="suspense">
  <action>林小米推门，风铃响起</action>
  <dialogue character="林小米">是你？</dialogue>
</scene>"""
    response = openai.chat.completions.create(
        model=model,
        messages=[{"role": "user", "content": prompt}],
        temperature=0.7,
        max_tokens=4000
    )
    script = response.choices[0].message.content
    return script

# 示例调用
if __name__ == "__main__":
    genre = "甜宠"
    keywords = "校园，图书馆偶遇"

    print("🎬 创意发散中...")
    outlines = generate_outlines(genre, keywords)
    print(f"生成了 {len(outlines)} 个大纲")

    print("📋 大纲评审中...")
    evaluation = evaluate_outlines(outlines)
    best_idx = evaluation["best_index"]
    best_outline = outlines[best_idx]
    print(f"选中大纲：{best_outline['title']}，评分理由：{evaluation['reason']}")

    print("🧑‍🎤 角色开发中...")
    characters = develop_characters(best_outline)
    print(f"创建了 {len(characters)} 个角色")

    print("📜 剧本扩写中...")
    script = expand_script(best_outline, characters)
    print("剧本草稿已完成，前500字预览：\n", script[:500])

{
  "storyboard": [
    {
      "index": 1,
      "duration_s": 5,
      "prompt": "a young woman in white dress, walking down a street at sunset, cinematic lighting, shallow depth of field",
      "negative_prompt": "blurry, low quality",
      "character_embeds": ["lin_mimi"],
      "camera": "dolly-in"
    }
  ]
}