diff --git a/rename.py b/rename.py
index 5592cbc..65b08f9 100755
--- a/rename.py
+++ b/rename.py
@@ -4,7 +4,14 @@ import re
 import sys
 
 def rename_file(filename):
-    name = filename.split('.')[0]          # ohne Endung
+    #if not os.path.exists(filename):
+    if '.' in filename:
+        name, extension = filename.rsplit('.', 1)
+    else:
+        name = filename.split('.')[0]
+        extension = filename.split('.')[1]
+    #name, extension = filename.rsplit('.', 1) if '.' in filename else (name = filename.split('.')[0])
+    # ohne Endung
 
     #print(temp+"."+filename.split('.')[1])
     #os.rename(filename, temp+"."+filename.split('.')[1])
@@ -48,7 +55,7 @@ def rename_file(filename):
         new_name = new_name.replace(",", "_")
 
 
-    os.rename(filename, new_name+"."+filename.split('.')[1])
+    os.rename(filename, new_name+"."+extension)
 
 
 
@@ -59,5 +66,5 @@ def rename_file(filename):
 # Aufruf der Funktion (aktuelles Verzeichnis oder ein anderes)
 #rename_files(".")
 
-#rename_file(sys.argv[1])
-rename_file("Hinreichendes Kriterium für lokale Extrema und Sattelpunkte für Funkt. m. zwei Variablen (Folge 189) (1080p_25fps_H264-128kbit_AAC).mp4")
\ No newline at end of file
+rename_file(sys.argv[1])
+#rename_file("Hinreichendes Kriterium für lokale Extrema und Sattelpunkte für Funkt. m. zwei Variablen (Folge 189) (1080p_25fps_H264-128kbit_AAC).mp4")
\ No newline at end of file
diff --git a/rename_all.py b/rename_all.py
index eab13f2..4a6af9d 100755
--- a/rename_all.py
+++ b/rename_all.py
@@ -15,7 +15,14 @@ def rename_files(directory):
             rename_file(file)
 
 def rename_file(filename):
-    name = filename.split('.')[0]          # ohne Endung
+    #if not os.path.exists(filename):
+    if '.' in filename:
+        name, extension = filename.rsplit('.', 1)
+    else:
+        name = filename.split('.')[0]
+        extension = filename.split('.')[1]
+    #name, extension = filename.rsplit('.', 1) if '.' in filename else (name = filename.split('.')[0])
+    # ohne Endung
 
     #print(temp+"."+filename.split('.')[1])
     #os.rename(filename, temp+"."+filename.split('.')[1])
@@ -59,9 +66,6 @@ def rename_file(filename):
         new_name = new_name.replace(",", "_")
 
 
-    os.rename(filename, new_name+"."+filename.split('.')[1])
-
-# Aufruf der Funktion (aktuelles Verzeichnis oder ein anderes)
-#rename_files(".")
+    os.rename(filename, new_name+"."+extension)
 
 rename_files(sys.argv[1])