protected function getStatsAttribute()
    {
        if (empty($this->response->output)) {
            return;
        }
        $o = $this->response->output;

        return array_filter([
            'Bitrate' => number_format($o->video_bitrate_in_kbps
                + $o->audio_bitrate_in_kbps).' kbps',
            'Filesize' => number_format($o->file_size_in_bytes/1024/1024, 1).' mb',
            'Duration' => number_format($o->duration_in_ms/1000, 1).' s',
            'Dimensions' => number_format($o->width).' x '.number_format($o->height),
            'Download' => '<a href="'.$this->outputs->mp4.'" target="_blank">MP4</a>'
        ]);
    }