fix:中文字幕位置推荐，视频较短时越界报错

detect_with_ocr.py

@@ -59,6 +59,8 @@ def evaluate_position(video_path: str, start_time: float) -> Tuple[float, float]
         for j in range(10):#每个阶段取10帧
             for k in range(120):#隔120帧取一帧
                 _,frame = video.read()
+            if (j+1)*120+frame_index>frame_num:
+                break
             _,frame = video.read()
             res = ocr.ocr(frame, cls=True)
             for result_item in res: