Update app.py

app.py

@@ -41,7 +41,7 @@ def generate_video():
         for id in range(len(lines)):
           create_text_image(lines[id],id*2,image_olst)
         print(image_olst)
-        image_files = sorted(glob.glob(os.path.join(image_folder, "*.png")))
+        image_files = sorted(glob.glob(os.path.join(image_olst, "*.png")))
         if not image_files:
             raise ValueError("No images found in folder!")