/**
* check if the file has audio
*
* @param string $file
* @return void
* @author Andy Bennett
*/
public static function has_audio($file)
{
$buffer = ffmpeg::get_buffer($file);
$audio = true;
preg_match('/Stream(.*): Audio: .*,(.*) channels.*/', $buffer, $matches);
if (count($matches) > 2) {
$audio = trim($matches[2]) != 0;
}
return $audio;
}
