string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%B4%A2%E7%88%B1k818C%E8%A7%86%E9%A2%91%E5%BD%95%E5%88%B6%E5%B8%A7%E6%95%B0 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
索爱k818C视频录制帧数
