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Add support for H264 levels #117

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Add support for H264 levels #117

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27 changes: 25 additions & 2 deletions src/PHPVideoToolkit/VideoFormat/H264.php
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Original file line number Diff line number Diff line change
Expand Up @@ -30,13 +30,15 @@ public function __construct($input_output_type=Format::OUTPUT, Config $config=nu
'h264_preset' => null,
'h264_tune' => null,
'h264_constant_quantization' => null,
'h264_profile' => null
'h264_profile' => null,
'h264_level' => null,
));
$this->_format_to_command = array_merge($this->_format_to_command, array(
'h264_preset' => '-preset <setting>',
'h264_tune' => '-tune <setting>',
'h264_constant_quantization' => '-qp <setting>',
'h264_profile' => '-profile:v <setting>'
'h264_profile' => '-profile:v <setting>',
'h264_level' => '-level <setting>',
));

$this->_restricted_video_presets = null;
Expand Down Expand Up @@ -106,6 +108,27 @@ public function setH264Profile($profile=null)
return $this;
}

public function setH264Level($level=null)
{
$this->_blockSetOnInputFormat('h264 level');

if($level === null)
{
$this->_format['h264_level'] = null;
return $this;
}

// Levels are described in Annex A of H.264 standard
// https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.264-200305-S!!PDF-E&type=items
if(in_array($level, array(1, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2, 5, 5.1)) === false)
{
throw new Exception('Unrecognised h264 level "'.$level.'" set in \\PHPVideoToolkit\\'.get_class($this).'::setH264Level');
}

$this->_format['h264_level'] = sprintf('%.1f', $level);
return $this;
}

public function enableH264LosslessEncoding()
{
$this->_format['h264_constant_quantization'] = 0;
Expand Down