string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BD%95%E5%83%8F%E6%9C%BA%E5%AE%9A%E7%A0%81%E7%8E%87%E5%92%8C%E5%8F%98%E7%A0%81%E7%8E%87%E7%9A%84%E5%85%B3%E7%B3%BB => Failed to connect to 101.89.166.210 port 38089: Connection refused"
录像机定码率和变码率的关系
