Capture stderr (tqdm/progress) in log stream alongside stdout

app.py

@@ -202,15 +202,19 @@ def generate_video(image, prompt, resolution, steps, guidance_scale, seconds, se
     result_box = [None]
     error_box  = [None]
     real_out   = sys.stdout
+    real_err   = sys.stderr
 
     def _run():
-        sys.stdout = _QueueWriter(log_q, real_out)
+        writer = _QueueWriter(log_q, real_out)
+        sys.stdout = writer
+        sys.stderr = writer  # tqdm and progress bars write to stderr
         try:
             result_box[0] = session.run_task(task)
         except Exception as exc:
             error_box[0] = exc
         finally:
             sys.stdout = real_out
+            sys.stderr = real_err
             log_q.put(None)  # sentinel
 
     t = threading.Thread(target=_run, daemon=True)