public function getAudioCodec()
    {
        if ($this->audioCodec === null) {
            $match = [];
            preg_match(self::$REGEX_AUDIO_CODEC, $this->output, $match);
            $this->audioCodec = array_key_exists(1, $match) ? trim($match[1]) : '';
        }

        return $this->audioCodec;
    }
public function getAudioCodec()
    {
        if ($this->audioCodec === null) {
            $match = [];
            preg_match(self::$REGEX_AUDIO_CODEC, $this->output, $match);
            $this->audioCodec = array_key_exists(1, $match) ? trim($match[1]) : '';
        }

        return $this->audioCodec;
    }
public function getAudioCodec ( ) { if ( $ this -> audioCodec === null ) { $ match = [ ] ; preg_match ( self :: $ REGEX_AUDIO_CODEC , $ this -> output , $ match ) ; $ this -> audioCodec = array_key_exists ( 1 , $ match ) ? trim ( $ match [ 1 ] ) : '' ; } return $ this -> audioCodec ; }
Return the name of the audio codec used to encode this movie.

@return string
Return the name of the audio codec used to encode this movie .