public function getPixelAspectRatio()
    {
        if ($this->pixelAspectRatio === null) {
            $match = [];
            preg_match(self::$REGEX_PIXEL_ASPECT_RATIO, $this->output, $match);
            $this->pixelAspectRatio = (array_key_exists(1, $match) && array_key_exists(
                    2,
                    $match
                )) ? ($match[1] / $match[2]) : 0;
        }

        return $this->pixelAspectRatio;
    }
public function getPixelAspectRatio()
    {
        if ($this->pixelAspectRatio === null) {
            $match = [];
            preg_match(self::$REGEX_PIXEL_ASPECT_RATIO, $this->output, $match);
            $this->pixelAspectRatio = (array_key_exists(1, $match) && array_key_exists(
                    2,
                    $match
                )) ? ($match[1] / $match[2]) : 0;
        }

        return $this->pixelAspectRatio;
    }
public function getPixelAspectRatio ( ) { if ( $ this -> pixelAspectRatio === null ) { $ match = [ ] ; preg_match ( self :: $ REGEX_PIXEL_ASPECT_RATIO , $ this -> output , $ match ) ; $ this -> pixelAspectRatio = ( array_key_exists ( 1 , $ match ) && array_key_exists ( 2 , $ match ) ) ? ( $ match [ 1 ] / $ match [ 2 ] ) : 0 ; } return $ this -> pixelAspectRatio ; }
Return the pixel aspect ratio of the movie.

@return float
Return the pixel aspect ratio of the movie .