diff --git a/renamePhotoBatch.py b/renamePhotoBatch.py
index 64df7e0..860f797 100644
--- a/renamePhotoBatch.py
+++ b/renamePhotoBatch.py
@@ -36,10 +36,15 @@ def solution():
 
     # 遍历照片文件并重命名
     for photo in photo_files:
-        creation_time_stamp = get_photo_taken_time(folder_path+"\\"+photo)
+        name = photo
+        photo = folder_path+"\\"+photo
+        creation_time_stamp = get_photo_taken_time(photo)
         if creation_time_stamp is None:
             continue
-        if photo.startswith('IMG'):
+        if name.startswith('IMG'):
+            file_name, file_ext = os.path.splitext(photo)
+            file_name = file_name[:-2]
+            os.rename(photo, f"{file_name}.jpeg")
             continue
         formatted_time = "IMG_" + creation_time_stamp.values.replace(':', '').replace(' ', '_')
         file_name, file_ext = os.path.splitext(photo)
@@ -51,6 +56,7 @@ def solution():
         while os.path.exists(new_file_path):
             new_file_name = f"{formatted_time}-{index}{file_ext}"
             new_file_path = os.path.join(folder_path, new_file_name)
+            index = index+1
         os.rename(photo, new_file_path)
 
     print("照片重命名完成！")