更新

backend/app/services/remotion_service.py

@@ -52,13 +52,21 @@ class RemotionService:
             输出视频路径
         """
         # 构建命令参数
-        cmd = [
-            "npx", "ts-node", "render.ts",
+        # 优先使用预编译的 JS 文件（更快），如果不存在则回退到 ts-node
+        compiled_js = self.remotion_dir / "dist" / "render.js"
+        if compiled_js.exists():
+            cmd = ["node", "dist/render.js"]
+            logger.info("Using pre-compiled render.js for faster startup")
+        else:
+            cmd = ["npx", "ts-node", "render.ts"]
+            logger.warning("Using ts-node (slower). Run 'npm run build:render' to compile for faster startup.")
+        
+        cmd.extend([
             "--video", str(video_path),
             "--output", str(output_path),
             "--fps", str(fps),
             "--enableSubtitles", str(enable_subtitles).lower()
-        ]
+        ])
 
         if captions_path:
             cmd.extend(["--captions", str(captions_path)])