diff --git a/piscat/GUI/Visualization/image_viewer.py b/piscat/GUI/Visualization/image_viewer.py
index 20bfd26..dd6705e 100644
--- a/piscat/GUI/Visualization/image_viewer.py
+++ b/piscat/GUI/Visualization/image_viewer.py
@@ -351,7 +351,7 @@ def call_save(self):
                 file_name=file_name,
                 data=self.save_video,
                 jump=self.frame_strides,
-                fps=self.fps,
+                duration=1000/self.fps,
             )
 
     @Slot()
diff --git a/piscat/InputOutput/write_video.py b/piscat/InputOutput/write_video.py
index 49fae49..918db5d 100644
--- a/piscat/InputOutput/write_video.py
+++ b/piscat/InputOutput/write_video.py
@@ -51,7 +51,7 @@ def write_binary(dir_path, file_name, data, type="original"):
     return save_path_
 
 
-def write_MP4(dir_path, file_name, data, jump=0, fps=10):
+def write_MP4(dir_path, file_name, data, jump=0, fps=100):
     """
     This function writes video as a MP4.
 
@@ -97,7 +97,7 @@ def write_MP4(dir_path, file_name, data, jump=0, fps=10):
     return save_path_
 
 
-def write_GIF(dir_path, file_name, data, jump=0, fps=10):
+def write_GIF(dir_path, file_name, data, jump=0, duration=100):
     """
     This function writes video as a GIF.
 
@@ -138,5 +138,5 @@ def write_GIF(dir_path, file_name, data, jump=0, fps=10):
     for frame_number in tqdm(range(0, data.shape[0] - jump, jump)):
         image_.append(data[frame_number, ...])
 
-    imageio.mimsave(save_path, image_, format="GIF", fps=fps)
+    imageio.mimsave(save_path, image_, format="GIF", duration=duration)
     return save_path_