diff --git a/backend/inpaint/sttn_inpaint.py b/backend/inpaint/sttn_inpaint.py
index c721115..ceed187 100644
--- a/backend/inpaint/sttn_inpaint.py
+++ b/backend/inpaint/sttn_inpaint.py
@@ -291,10 +291,10 @@ class STTNVideoInpaint:
                         mask_area = mask[inpaint_area[k][0]:inpaint_area[k][1], :]
                         frame[inpaint_area[k][0]:inpaint_area[k][1], :, :] = mask_area * comp + (1 - mask_area) * frame[inpaint_area[k][0]:inpaint_area[k][1], :, :]
                     writer.write(frame)
-                    if input_sub_remover is not None and input_sub_remover.gui_mode:
+                    if input_sub_remover is not None:
                         if tbar is not None:
                             input_sub_remover.update_progress(tbar, increment=1)
-                        if original_frame is not None:
+                        if original_frame is not None and input_sub_remover.gui_mode:
                             input_sub_remover.preview_frame = cv2.hconcat([original_frame, frame])
         # 释放视频写入对象
         writer.release()
diff --git a/backend/main.py b/backend/main.py
index 3c19993..d59614f 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -670,12 +670,14 @@ class SubtitleRemover:
         print('[Processing] start removing subtitles...')
         if self.sub_area is not None:
             ymin, ymax, xmin, xmax = self.sub_area
-            mask_area_coordinates = [(xmin, xmax, ymin, ymax)]
-            mask = create_mask(self.mask_size, mask_area_coordinates)
-            sttn_video_inpaint = STTNVideoInpaint(self.video_path)
-            sttn_video_inpaint(input_mask=mask, input_sub_remover=self, tbar=tbar)
         else:
-            print('please set subtitle area first')
+            print('[Info] No subtitle area has been set. Video will be processed in full screen. As a result, the final outcome might be suboptimal.')
+            ymin, ymax, xmin, xmax = 0, self.frame_height, 0, self.frame_width
+        mask_area_coordinates = [(xmin, xmax, ymin, ymax)]
+        mask = create_mask(self.mask_size, mask_area_coordinates)
+        sttn_video_inpaint = STTNVideoInpaint(self.video_path)
+        sttn_video_inpaint(input_mask=mask, input_sub_remover=self, tbar=tbar)
+
 
     def sttn_mode(self, tbar):
         # 是否跳过字幕帧寻找