string(257) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%91%84%E5%83%8F%E6%9C%BA%E5%8F%98%E7%A0%81%E7%8E%87%E4%B8%8E%E5%AE%9A%E7%A0%81%E7%8E%87 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
摄像机变码率与定码率
