def download_video(self, url, filename):
     if PathUtil.check_path(filename):
         PathUtil.remove(filename)
     retry_times = 2
     while retry_times > 0:
         try:
             request = BilibiliApi.build_video_download_request(url)
             response = RequestUtil.do_request(request,
                                               load_json=False,
                                               stream=True)
             self.before_response(response)
             self.save_video(response.raw_response, filename)
             break
         except:
             print(
                 f'{filename} download fail, retry times = {retry_times}, restart...'
             )
             retry_times -= 1
             if retry_times == 0:
                 raise Exception('retry times exceed, stop downloading...')
             continue
 def merge_video(self, output, *files):
     if PathUtil.check_path(output):
         PathUtil.remove(output)
         return
     print('正在尝试合并视频,请参考控制台输出')
     FFmpegUtil(CONFIG['FFMPEG_PATH']).merge(*files, output=output)