webページを数秒毎にキャプチャ

pict.js

// see http://code.ohloh.net/file?fid=kXVN5HCJK4Nv7fjwDTtngR5gaug&cid=RhmXKV7xKoA&s=&fp=386616&mp&projSelected=true#L0
var page_url        = 'http://hitode909.hatenablog.com/entry/2014/03/17/201717';
var frame_width     = 640;
var frame_height    = 390;
var frame_interval  = 80;                   // 25fps if time_factor = 2
var max_frames      = 50;                // 10 minutes @ 25fps
var frame_dir       = 'frames';             // where PNG files will be written

console.log('start');

var page = require('webpage').create();
page.viewportSize = { width: frame_width, height: frame_height };

page.onConsoleMessage = function (msg) {
    console.log('>> ' + msg);
//phantom.exit();
};

console.log('page.open');
console.log(page_url);
page.open(page_url, function() {
    var frame_number = 0;
    setInterval(function() {
        filename = "frame_" + '0000'.substr(('' + frame_number).length) + frame_number + '.png';
        console.log(filename);
        page.render(frame_dir + '/' + filename);
        frame_number++;
        if(frame_number > max_frames) {
            console.log("Timing out after " + max_frames + " frames");
            phantom.exit();
        }
    }, frame_interval);
});

brew install phantomjs
phantomjs pict.js
cd frames
convert -delay 5 -loop 0 frame_*.png movie.gif