Update app.py

app.py

@@ -63,7 +63,7 @@ def render_annotations(annotations, image_dir):
         surface = canvas.getSurface()
         # image_buffer = surface.makeImageSnapshot().encode(skia.kPNG_Codec)
         # annotated_images.append((image_buffer, f"Page {page_index}"))
-        surface.makeImageSnapshot().save(output_path, skia.kPNG_Codec)
+        surface.makeImageSnapshot().save(output_path)
         annotated_images.append(output_path)
     
     return annotated_images