diff --git a/app/core/meta/metabase.py b/app/core/meta/metabase.py
index 76f9830f..f0754951 100644
--- a/app/core/meta/metabase.py
+++ b/app/core/meta/metabase.py
@@ -452,11 +452,11 @@ class MetaBase(object):
         return self.audio_encode or ""
 
     @property
-    def frame_rate(self) -> str:
+    def frame_rate(self) -> int:
         """
         返回帧率信息
         """
-        return self.fps or ""
+        return self.fps or None
 
     def is_in_season(self, season: Union[list, int, str]) -> bool:
         """