string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=potplayer%E5%AE%89%E8%A3%85%E9%A2%9D%E5%A4%96%E7%9A%84%E7%BC%96%E7%A0%81%E5%99%A8 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
potplayer安装额外的编码器
