在这6个类别中进行选择：
- AR_MOBILE is for playback on Mobile Devices (small filesize)
- AR_SOCIAL is for uploading on Social Media (Instagram, Facebook etc.)
- AR_WEB is for uploading on Streaming Sites / Web (YouTube, Vimeo, etc.)
- AR_MASTER is for high quality export / archive (large filesize)
- AR_DRAFT is for Quick Preview / Draft (Clients, Revisions, etc.)
- AR_TRANSPARENT is for exporting videos with a transparent background (with Alpha channel)
