PHP Script to convert mp4's to mpeg using ffmpeg from the command line

convert_mp4_to_mpeg.php

<?php
/**
 * Created by PhpStorm.
 * User: jamest
 * Date: 02/11/15
 * Time: 10:14
 */

class Convert {
    private $commandLine, $path;

    private $command = "ffmpeg -y -i \"{input_file}\" -f mpeg1video -b:v 500k \"{output_file}\"";

    private $regex = "/\\.mp4\$/i";

    function __construct()
    {
        global $argv;

        $this->commandLine = (php_sapi_name() == 'cli' || empty($_SERVER['REMOTE_ADDR']));
        $this->path = $this->path ? $this->path : dirname(__FILE__);

        if ($this->commandLine && sizeof($argv) > 1)
        {
            //$this->convert($argv[1]);
            $this->setup($argv[1]);
        }
    }

    public function setup($path = '')
    {
        $this->log("Scanning $path for mp4's");

        try {
            $dir = new DirectoryIterator($path);
        }
        catch (UnexpectedValueException $e)
        {
            $this->log("Error: {$e->getMessage()}");
            die;
        }

        $it = new RegexIterator($dir, $this->regex);

        $total = sizeof(iterator_to_array($it));

        if ( $total < 1 )
        {
            $this->log("No files found regex {$this->regex}");
            die;
        }

        $this->log("Found {$total} files matching regex {$this->regex}");

        chdir($path);

        $mpegs_dir = 'mpegs';

        if ( !file_exists($mpegs_dir) )
            mkdir($mpegs_dir);

        $this->log("Creating mpegs directory");

        foreach($it as $filename)
        {
            $this->convert($filename);
        }
/*
 drwxr-xr-x  3 root root     4096 Sep 29 06:36 .
 drwx--xr-x  4 root root     4096 Sep 29 06:52 .
 */
    }

    public function convert($filename = '')
    {
        $file = pathinfo($filename);

        $cmd = str_replace(
            ["{input_file}", "{output_file}"],
            [$filename, './mpegs/' . $file['filename'] . '.mpg'],
            $this->command
        );

        $this->log($cmd);

        $log = exec($cmd, $val);
        //echo $val;

        //print_r($file);

    }

    private function log($msg)
    {
        echo $msg . "\n";
    }
}

$convert = new Convert();