Update app.py

app.py

@@ -176,7 +176,7 @@ class AnimateController:
         image = Image.open(input_path)
 
         # Resize the image while maintaining the aspect ratio
-        image.thumbnail((new_width, new_height))
+        image.resize((new_width, new_height), Image.LANCZOS)
 
         # Save the resized image to the specified output path
         image.save(output_path)