diff --git a/ffmpeg-helper/src/main.py b/ffmpeg-helper/src/main.py
index ebdeb31..e0e48c1 100644
--- a/ffmpeg-helper/src/main.py
+++ b/ffmpeg-helper/src/main.py
@@ -179,9 +179,7 @@ def time_format_check(self, time_raw):
                 tmp = int(x) + carry
                 if tmp > 59:
                     carry = tmp // 60
-                    tmp -= 60
-                else:
-                    carry = 0
+                    tmp %= 60
                 time_legal.append(str(tmp))
             except:
                 return ""