static A5 version of https://github.com/ariya/phantomjs/blob/master/examples/rasterize.js

rasterize.js

'use strict';

var page = require('webpage').create();
var system = require('system');
var address;
var output;

if (system.args.length < 3) {
  console.log('Usage: rasterize.js [URL|filepath] filename');
  phantom.exit(1);
} else {
  address = system.args[1];
  output = system.args[2];

  var pageWidth = '148mm';
  var pageHeight = '210mm';

  page.paperSize = {
      width: pageWidth,
      height: pageHeight,
      margin: 0
  };

  page.open(address, function (status) {
    if (status !== 'success') {
      console.log('Unable to load the address!');
      phantom.exit(1);
    } else {
      window.setTimeout(function () {
        page.render(output);
        phantom.exit();
      }, 200);
    }
  });
}