Rename file to standard naming convention. Node.JS script to take a list of files and rename each to the format YYYYMMDD_hhmmss.ext. Used by the criminally pedantic when archiving images and movies. Requires Node.JS version 0.8 or higher.

ren.js

var fs = require('fs');
var path = require('path');
var util = require('util');
var dateFormat = require('dateformat');

process.argv.forEach(function(val, index, array) {
    if (index < 2) return;
    if (! fs.existsSync(val)) {
        console.error("File \"" + val + "\" does not exist.");
        return;
    }
    s = fs.statSync(val);
    if (!s.isFile()) {
        console.error("\"" + val + "\" is not a plain file.");
        return;
    }
    mtime = new Date(s.mtime);
    var newname = dateFormat(mtime, "yyyymmdd_HHMMss") + path.extname(val);
    console.log(newname);
    fs.renameSync(val, newname);
});