Update app.py

app.py

@@ -157,7 +157,7 @@ def infer(video_in, do_inversion, wts, zs,
         #image = Image.fromarray(output_frame[0])
         image.save("_frame_" + str(i) + ".jpeg")
         result_frames.append("_frame_" + str(i) + ".jpeg")
-        print("frame " + i + "/" + str(n_frame) + ": done;")
+        print("frame " + str(i) + "/" + str(n_frame) + ": done;")
 
     
     final_vid = create_video(result_frames, fps)