diff --git a/coub-dl.py b/coub-dl.py
index 40545b0..0b45922 100755
--- a/coub-dl.py
+++ b/coub-dl.py
@@ -58,13 +58,9 @@ class coub_dl:
         self.check_downloads()
         self.fix_video_stream()
 
-        self.calculate_loops()
-
         # write concat helper file for ffmpeg
-        with open(self._files_dict[File.LIST], 'w') as f:
-            for i in range(self._loopdata.base):
-                print("file '{}'".format(self._loopdata.file), file=f)
-            print("file '{}'".format(self._files_dict[File.FRACTION]), file=f)
+        self.calculate_loops()
+        self.write_concat_helper()
 
         # loop & mux streams
         self.loop_shorter_stream()
@@ -122,6 +118,13 @@ class coub_dl:
         self._loopdata.fraction = times % 1
 
 
+    def write_concat_helper(self):
+        with open(self._files_dict[File.LIST], 'w') as f:
+            for i in range(self._loopdata.base):
+                f.write("file '{}'\n".format(self._loopdata.file))
+            f.write("file '{}'\n".format(self._files_dict[File.FRACTION]))
+
+
     def loop_shorter_stream(self):
         # prepare last fractional loop
         call(('ffmpeg', '-i', self._loopdata.file, '-t', str(self._loopdata.fraction *