[OLD] Video convertion library

<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		Rick Ellis
 * @copyright	Copyright (c) 2006, EllisLab, Inc.
 * @license		http://www.codeignitor.com/user_guide/license.html
 * @link		http://www.codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Video Class
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Libraries
 * @author		Philip Sturgeon
 * @link		http://www.codeigniter.com/user_guide/libraries/ftp.html
 */ 
class Video {

	var $filename 			= '';
	var $videoWidth			= 0;
	var $videoHeight		= 0;
	var $videoFPS			= 0;
	var $audioBitRate		= 0;
	var $audioSampleRate	= 0;
	var $duration			= 0;
	
	var $error_string = '';
	
	var $videoObj;
	var $CI;
	
	/**
	 * Constructor - Sets Preferences
	 *
	 * The constructor can be passed an array of config values
	 */	
	function Video()
	{	
		$this->CI =& get_instance();
		$this->CI->config->load('content');
		
		log_message('debug', "Video Class Initialized");
		
		if(extension_loaded('ffmpeg')):
			log_message('debug', "Video Class exited before finishing, missing the FFMPEG extention.");
			$this->error_string  = "ffmpeg extension not loaded";
		endif;
	}

	// --------------------------------------------------------------------

	/**
	 * Initialize preferences
	 *
	 * @access	public
	 * @param	array
	 * @return	void
	 */	
	// Eg: test.avi would be convert_to_flv('test', '.avi')
	function load_video($srcFile = '')
	{
		$this->CI=& get_instance();
						
		// Create our FFMPEG-PHP object
		$this->videoObj = new ffmpeg_movie($srcFile);
		
		// Store the name of the file
		$this->filename = $srcFile;
		
		if(!empty($this->videoObj)):
		
			$this->videoWidth		= $this->_makeMultipleTwo($this->videoObj->getFrameWidth());
			$this->videoHeight		= $this->_makeMultipleTwo($this->videoObj->getFrameHeight());
			$this->videoFPS			= $this->videoObj->getFrameRate();
			$this->audioBitRate		= @intval($this->videoObj->getAudioBitRate()/1000);
			$this->audioSampleRate	= @$this->videoObj->getAudioSampleRate();
			$this->duration			= $this->videoObj->getDuration();
		
		else:
			$this->error_string = 'Unable to initiate video properly.';
			
		endif;
	}
	
	/**
	 * Convert the file to FLV
	 *
	 * @access	public
	 * @param	array
	 * @return	void
	 */	
	function convert_to_flv($destFolder)
	{
		$this->CI=& get_instance();
		
		$ffmpegPath = $this->CI->config->item('ffmpegPath');
		$flvtool2Path = $this->CI->config->item('flvtool2Path');
		
		// Extention of file is...
		list($name, $ext) = explode('.', basename($this->filename));
		$converted_name = $destFolder.$name.'.flv';
		
		// Call our convert using exec()
		exec($ffmpegPath . " -i " . $this->filename . " -ar " . $this->audioSampleRate . " -ab " . $this->audioBitRate . " -f flv -s " . $this->videoWidth . "x" . $this->videoHeight . " " . $converted_name . " | " . $flvtool2Path . " -U stdin " . $converted_name);
				
		// Delete the origional file if the new files size is more than 0
		if(file_exists($this->filename) && filesize($converted_name) > 0)
		{
			unlink($this->filename);
			$this->filename = $converted_name;	
		} else {
			log_message('debug', "Video convert error, new file size is 0");
			return false;
		}
		
		// Check the new file exists, return true or false
		return (file_exists($this->filename));
	
	}
	
	// Take the current video object and creates a thumbail
	function create_thumb($thumbFile)
	{
		if(!is_object($this->videoObj)) echo 'FALSE';
		
		// Pick a frame to use as the thumb, this is 1/8th through it	
		//$captureFrame = round($this->videoObj->getFrameCount() / 3);
		
		$thumb=$this->videoObj->getFrame(20);

		if ($thumb) {

			$thumbImage = $thumb->toGDImage();
			if ($thumbImage) {

					imagepng($thumbImage,$thumbFile);
					imagedestroy($thumbImage);
					
					return true;
			}
		}
	
		return false;
	}
	

	// --------------------------------------------------------------------

	// Used in the convertion pricess!
	function _makeMultipleTwo ($value)
	{
		$sType = gettype($value/2);
		return ($sType == "integer") ? $value : ($value-1);
	}

}
// END MY_FTP Class
?>