diff --git a/scripts/iib/dir_cover_cache.py b/scripts/iib/dir_cover_cache.py
index 71b49cd..8153343 100644
--- a/scripts/iib/dir_cover_cache.py
+++ b/scripts/iib/dir_cover_cache.py
@@ -33,7 +33,7 @@ def get_media_files_from_folder(folder_path):
     """
     media_files = []
     with os.scandir(folder_path) as entries:
-        for entry in sorted(entries, key=lambda x: x.stat().st_mtime, reverse=True):
+        for entry in sorted(entries, key=lambda x: x.stat().st_birthtime if hasattr(x.stat(), 'st_birthtime') else x.stat().st_ctime, reverse=True):
             if entry.is_file() and is_valid_media_path(entry.path):
                 name = os.path.basename(entry.path)
                 stat = entry.stat()
diff --git a/scripts/iib/tool.py b/scripts/iib/tool.py
index 3d63524..520058f 100644
--- a/scripts/iib/tool.py
+++ b/scripts/iib/tool.py
@@ -205,6 +205,17 @@ def get_video_type(file_path):
         return file_extension[1:] 
     else:
         return None
+    
+def is_image_file(filename: str) -> bool:
+    if not isinstance(filename, str):
+        return False
+    
+    extensions = ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp']
+    extension = filename.split('.')[-1].lower()
+    return f".{extension}" in extensions
+
+def is_video_file(filename: str) -> bool:
+    return isinstance(get_video_type(filename), str)
 
 def is_valid_media_path(path):
     """
@@ -215,9 +226,7 @@ def is_valid_media_path(path):
         return False
     if not os.path.isfile(abs_path):  # 判断是否是文件
         return False
-    if not imghdr.what(abs_path) and not get_video_type(abs_path):  # 判断是否是图像文件
-        return False
-    return True
+    return is_image_file(abs_path) or is_video_file(abs_path)