Update track.py

track.py

@@ -175,6 +175,7 @@ def run(
                 p = non_max_suppression(preds, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
             
         # Process detections
+        filename = 'out.mp4'
         for i, det in enumerate(p):  # detections per image
             seen += 1
             if webcam:  # bs >= 1
@@ -182,7 +183,6 @@ def run(
                 p = Path(p)  # to Path
                 s += f'{i}: '
                 txt_file_name = p.name
-                filename = 'out.mp4'
                 save_path = str(save_dir / filename)  # im.jpg, vid.mp4, ...
                 
             else: