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<?php
/**
* This file is part of the PHP-FFmpeg-video-streaming package.
*
* (c) Amin Yazdanpanah <[email protected]>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Streaming\Format;
* The VP9 video format
final class VP9 extends Video
{
* VP9 constructor.
* @param string $video_codec
* @param string|null $audio_codec
public function __construct(string $video_codec = 'libvpx-vp9', string $audio_codec = null)
$this->setVideoCodec($video_codec);
if($audio_codec){
$this->setAudioCodec($audio_codec);
}
* {@inheritDoc}
public function getAvailableAudioCodecs()
return [''];
public function getAvailableVideoCodecs(): array
return ['libvpx', 'libvpx-vp9'];
* @return int
public function getModulus()
return 2;
* Returns true if the current format supports B-Frames.
* @see https://wikipedia.org/wiki/Video_compression_picture_types
* @return Boolean
public function supportBFrames()
return true;