Windows下Node.js使用child_process模块调用系统命令的编码问题

看代码：

const cp = require('child_process');
const iconv = require('iconv-lite');

let pid = 2756;

cp.exec(`tasklist /FI "PID eq 2756"`, {encoding: 'buffer'}, (error , stdout, stderr) => {
  if (error) throw error;
  stdout = iconv.decode(stdout, 'gbk');
  console.log(stdout);
});