diff --git a/utils/video_utils.py b/utils/video_utils.py
index 392b749..536068f 100644
--- a/utils/video_utils.py
+++ b/utils/video_utils.py
@@ -1,5 +1,7 @@
 import os
 import tempfile
+import time
+from pathlib import Path
 
 import cv2
 from loguru import logger
@@ -30,8 +32,23 @@ def get_first_frame(video_path, output_path):
 
         # 保存首帧为图片
         try:
-            cv2.imwrite(output_path, frame)
-            logger.info(f"首帧已保存为: {output_path}")
+            # 获取项目根目录
+            project_root = os.getcwd()
+            project_root_path = Path(project_root).resolve()
+
+            # 创建临时目录
+            temp_dir = project_root_path / "temp"
+            try:
+                temp_dir.mkdir(parents=True, exist_ok=True)
+            except Exception as e:
+                logger.error(f"Failed to create temp directory: {e}")
+                raise FileNotFoundError(f"Could not create temp directory: {temp_dir}")
+
+            # 生成唯一的临时文件名
+            timestamp = int(time.time())
+            output_image_path = temp_dir / output_path
+            cv2.imwrite(str(output_image_path), frame)
+            logger.info(f"首帧已保存为: {str(output_image_path)}")
         except Exception as e:
             logger.error(f"保存首帧图片失败: {e}")
             cap.release()
@@ -39,7 +56,7 @@ def get_first_frame(video_path, output_path):
 
         # 释放资源
         cap.release()
-        return os.path.abspath(output_path)
+        return os.path.abspath(str(output_image_path))
 
     except Exception as e:
         logger.error(f"提取视频首帧时出错: {e}")