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<?php
namespace FFMpeg\Filters\AdvancedMedia;
use FFMpeg\Media\AdvancedMedia;
/**
* "xstack" filter.
* This filter helps you to create a collage from the given videos.
* This filter is supported starting from 4.1 ffmpeg version.
* (On early versions you can use combinations of hstack and vstack filters).
*
* @see https://ffmpeg.org/ffmpeg-filters.html#xstack
*/
class XStackFilter extends AbstractComplexFilter
{
const LAYOUT_2X2 = '0_0|0_h0|w0_0|w0_h0';
const LAYOUT_1X4 = '0_0|0_h0|0_h0+h1|0_h0+h1+h2';
const LAYOUT_3X3 = '0_0|0_h0|0_h0+h1|w0_0|w0_h0|w0_h0+h1|w0+w3_0|w0+w3_h0|w0+w3_h0+h1';
const LAYOUT_4X4 = '0_0|0_h0|0_h0+h1|0_h0+h1+h2|w0_0|w0_h0|w0_h0+h1|w0_h0+h1+h2|w0+w4_0|w0+w4_h0|w0+w4_h0+h1|w0+w4_h0+h1+h2|w0+w4+w8_0|w0+w4+w8_h0|w0+w4+w8_h0+h1|w0+w4+w8_h0+h1+h2';
/**
* @var string
*/
private $layout;
/**
* @var int
*/
private $inputsCount;
/**
* CustomComplexFilter constructor.
*
* @param string $layout
* @param int $inputsCount
* @param int $priority
*/
public function __construct($layout, $inputsCount, $priority = 0)
{
parent::__construct($priority);
$this->layout = $layout;
$this->inputsCount = $inputsCount;
}
/**
* @param int $count
*
* @return string
*/
public static function getInputByCount($count)
{
$result = '';
for ($i = 0; $i < $count; $i++) {
$result .= '[' . $i . ':v]';
}
return $result;
}
/**
* Get name of the filter.
*
* @return string
*/
public function getName()
{
return 'xstack';
}
/**
* Get minimal version of ffmpeg starting with which this filter is supported.
*
* @return string
*/
public function getMinimalFFMpegVersion()
{
return '4.1';
}
/**
* {@inheritdoc}
*/
public function applyComplex(AdvancedMedia $media)
{
return array(
'-filter_complex',
$this->getName() . $this->buildFilterOptions(array(
'inputs' => $this->inputsCount,
'layout' => $this->layout
))
);
}
}