Fix after suggestion

detect.py

@@ -95,8 +95,12 @@ def detect(save_img=False):
                 for *xyxy, conf, cls in det:
                     if save_txt:  # Write to file
                         xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist()  # normalized xywh
-                        with open(save_path[:save_path.rfind('.')] + '.txt', 'a') as file:
-                            file.write(('%g ' * 5 + '\n') % (cls, *xywh))  # label format
+                        if dataset.frame == 0:
+                            with open(save_path[:save_path.rfind('.')] + '.txt', 'a') as f:
+                                f.write(('%g ' * 5 + '\n') % (cls, *xywh))  # label format
+                        else:
+                            with open(save_path[:save_path.rfind('.')] + '_' + str(dataset.frame) + '.txt', 'a') as f:
+                                f.write(('%g ' * 5 + '\n') % (cls, *xywh))  # label format
 
                     if save_img or view_img:  # Add bbox to image
                         label = '%s %.2f' % (names[int(cls)], conf)