<?php
/**
* This file is part of the PHP Video Toolkit v2 package.
*
* @author Oliver Lillie (aka buggedcom) <publicmail@buggedcom.co.uk>
* @license Dual licensed under MIT and GPLv2
* @copyright Copyright (c) 2008-2014 Oliver Lillie <http://www.buggedcom.co.uk>
* @package PHPVideoToolkit V2
* @version 2.1.7-beta
* @uses ffmpeg http://ffmpeg.sourceforge.net/
*/
namespace PHPVideoToolkit;
/**
* @access public
* @author Oliver Lillie
* @package default
*/
class VideoFormat_Flv extends VideoFormat
{
protected $_post_process_meta_data_injection;
protected $_enforce_meta_data_success;
public function __construct($input_output_type=Format::OUTPUT, Config $config=null)
{
parent::__construct($input_output_type, $config);
// default by forcing the audio codec to use mp3
if($input_output_type === 'output')
{
$this->setAudioCodec('libmp3lame')
->setVideoCodec('flv1')
->setFormat('flv');
}
$this->_restricted_audio_codecs = array('libmp3lame', 'libshine', 'mp3');
$this->_restricted_video_codecs = array('flv1');
$this->_restricted_audio_sample_frequencies = array(44100, 22050, 11025);
$this->forceMetaDataInjectionSuccess();
// determine if we are to inject meta data into the flv
// remember doing so puts any save into blocking mode so if you are using ProgressHandlerPortable
// you must access the $process->getPortableId() before calling save or saveNonBlocking.
if($this->_config && $this->_config->force_enable_flv_meta === true)
{
$this->enableMetaDataInjection();
}
}
public function enableMetaDataInjection()
{
$this->_post_process_meta_data_injection = true;
}
public function disableMetaDataInjection()
{
$this->_post_process_meta_data_injection = false;
}
public function allowMetaDataInjectionFailure()
{
$this->_enforce_meta_data_success = false;
}
public function forceMetaDataInjectionSuccess()
{
$this->_enforce_meta_data_success = true;
}
public function updateFormatOptions(&$save_path, $overwrite)
{
parent::updateFormatOptions($save_path, $overwrite);
// ffmpeg moans about audio sample frequencies on videos that aren't one of the following
// audio sample rates. 44100, 22050, 11025
if(empty($this->_format['audio_sample_frequency']) === true)
{
$audio_data = $this->_media_object->readAudioComponent();
if(empty($audio_data['sample']['rate']) === true)
{
$this->setAudioSampleFrequency($this->_restricted_audio_sample_frequencies[0]);
}
else if(in_array($audio_data['sample']['rate'], $this->_restricted_audio_sample_frequencies) === false)
{
$current_sample_rate = $audio_data['sample']['rate'];
if($current_sample_rate > $this->_restricted_audio_sample_frequencies[0])
{
$current_sample_rate = $this->_restricted_audio_sample_frequencies[0];
}
else
{
// TODO
$current_sample_rate = $this->_restricted_audio_sample_frequencies[0];
}
$this->setAudioSampleFrequency($current_sample_rate);
}
}
// assign a post process so that yamdil (http://yamdi.sourceforge.net/) injects the meta data into to the flv.
if($this->_post_process_meta_data_injection === true)
{
$this->_media_object->registerOutputPostProcess(array($this, 'postProcessMetaData'));
}
return $this;
}
/**
* Specifically for authomatic post processing of FLV output to inject metadata,
* however it can also be used as a standalone function call from the FLVFormat object.
*
* @access public
* @author Oliver Lillie
* @param Media $media
* @return Media
*/
public function postProcessMetaData(Media $media)
{
// set the yamdi input and output options.
$output = $media->getMediaPath();
$temp_output = $output.'.yamdi.flv';
// build the yamdi process
$yamdi_process = new ProcessBuilder('yamdi', $this->_config);
$exec = $yamdi_process
->add('-i')->add($output)
// ->add('-i', $output)
->add('-o')->add($temp_output)
->add('-s')
->add('-k')
->getExecBuffer();
// execute the process.
$exec->setBlocking(true)
->execute();
// check for any yamdi errors
if($exec->hasError() === true)
{
if(is_file($temp_output) === true)
{
@unlink($temp_output);
}
if($this->_enforce_meta_data_success === true)
{
@unlink($output);
throw new FfmpegProcessPostProcessException('Yamdi post processing of "'.$output.'" failed. The output file has been removed. Any additional Yamdi message follows:
'.$exec->getBuffer());
}
// TODO, log or exception not sure as the original file is ok.
}
else
{
// nope everything went ok. so delete ffmpeg file, and then rename yamdi file to that of the original.
unlink($output);
rename($temp_output, $output);
}
return $media;
}
}
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