Describe the bug
I'm trying to add kilobitrates to Auto Generated Representations and I'm getting this error: The count of the side value array should be the same as the count of the kilo bitrate array

To Reproduce
Steps to reproduce the behavior:

1. Go to '/../AutoReps.php'
2. On Line '109'
3. The code:

$ffmpeg->open($video_path)
            ->hls()
            ->x264()
            ->autoGenerateRepresentations(
                [1080, 720, 360],
                [6000, 4000, 1000]
            )
            //->addRepresentations($rep)
            ->save(storage_path('app/videos/test2/test.m3u8'));

4. See error: The count of side value array must be the same as the count of kilo bitrate array

Desktop/Server (please complete the following information):

• OS: Centos
• Version 7
• FFmpeg vesion: 4.3