AI 生成: 一个基于 AI 的全自动短视频生成工具，输入主题即可自动生成脚本、配音、字幕和合成视频。使用 Python + Flask 提供 Web 界面，支持命令行模式。

2026-09-28 22:31:39 +08:00
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+# -*- coding: utf-8 -*-
+"""视频合成模块
+
+使用 MoviePy 将图片背景 + 音频 + 字幕合成为最终视频。
+"""
+
+import os
+from moviepy.editor import (
+    ImageClip,
+    AudioFileClip,
+    CompositeVideoClip,
+    concatenate_videoclips,
+    ColorClip,
+)
+from moviepy.video.tools.subtitles import SubtitlesClip
+from moviepy.editor import TextClip
+
+
+def _make_bg(size, duration, color=(20, 20, 40)):
+    """生成纯色背景片段"""
+    return ColorClip(size=size, color=color, duration=duration)
+
+
+def _make_subtitle_clip(text: str, size, duration: float):
+    """生成一段字幕文本片段"""
+    w, h = size
+    try:
+        txt = TextClip(text, fontsize=48, color="white", font="Arial",
+                       size=(w - 100, None), method="caption")
+    except Exception:
+        # 若系统找不到字体，退化为默认字体
+        txt = TextClip(text, fontsize=48, color="white",
+                       size=(w - 100, None), method="caption")
+    txt = txt.set_position(("center", h - 180)).set_duration(duration)
+    return txt
+
+
+def compose_video(scenes: list, audio_paths: list, durations: list,
+                  out_path: str, resolution=(1280, 720)) -> str:
+    """合成最终视频。
+
+    Args:
+        scenes: 场景列表
+        audio_paths: 每个场景对应的音频路径
+        durations: 每个场景的时长
+        out_path: 输出 mp4 路径
+        resolution: (width, height)
+
+    Returns:
+        str: 输出文件路径
+    """
+    os.makedirs(os.path.dirname(out_path), exist_ok=True)
+    clips = []
+    for scene, audio, dur in zip(scenes, audio_paths, durations):
+        bg = _make_bg(resolution, dur)
+        sub = _make_subtitle_clip(scene["text"], resolution, dur)
+        audio_clip = AudioFileClip(audio)
+        clip = CompositeVideoClip([bg, sub]).set_audio(audio_clip)
+        clips.append(clip)
+
+    final = concatenate_videoclips(clips, method="compose")
+    final.write_videofile(out_path, fps=24, codec="libx264", audio_codec="aac")
+    return out_path
+
+
+if __name__ == "__main__":
+    print("请通过 cli.py 或 app.py 调用")