diff --git a/health-video-server/src/main/java/com/health/video/server/service/impl/VideoServiceImpl.java b/health-video-server/src/main/java/com/health/video/server/service/impl/VideoServiceImpl.java
index e35e982..17496ff 100644
--- a/health-video-server/src/main/java/com/health/video/server/service/impl/VideoServiceImpl.java
+++ b/health-video-server/src/main/java/com/health/video/server/service/impl/VideoServiceImpl.java
@@ -213,7 +213,7 @@ public class VideoServiceImpl implements VideoService {
         int dotIndex = originalFilename.lastIndexOf(".");
         String result = originalFilename.substring(0, dotIndex);
         // 获取文件后缀，因此此后端代码可接收一切文件，上传格式前端限定
-        String fileExt = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1).toLowerCase();
+        String fileExt = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")).toLowerCase();
         String fileName = result + fileExt;
         vodConfig.put("filename",fileName); // 此参数不重要，只要能保留文件后缀名如 a.mp4 即可
         vodConfig.put("vn", result); // ..  . 分组配置、回调参数