diff --git a/tsmark/video_annotator.py b/tsmark/video_annotator.py
index c5eae57..7347862 100755
--- a/tsmark/video_annotator.py
+++ b/tsmark/video_annotator.py
@@ -988,7 +988,7 @@ class World:
 
     def interpolate_points_in_thread(self):
 
-        self.points_interpolation_frequency = 1
+        self.points_interpolation_frequency = 0.5
 
         while True:
             if self.points_interpolation_thread_exit:
@@ -998,6 +998,8 @@ class World:
                 continue
 
             for point_index in self.points_interpolation_required:
+                if self.points_interpolation_thread_exit:
+                    return
                 if self.get_interpolation_required(point_index):
                     self.interpolate_points(point_index)