phantomjs_screenshot.js

var page = require('webpage').create();
page.clipRect = {
  width: 1824,
  height: 984
};
page.viewportSize = {
  width: 1824,
  height: 984
};
page.open('http://localhost', function(status) {
  just_wait();
});

function just_wait() {
  setTimeout(function() {
    console.log(status);
    page.render('localhost.png');
    console.log('Hello, world2!');
    phantom.exit();
  }, 5000);
}