Add option to double added audio tracks (AAC + AC-3) for 5.4.
Add option to double added audio tracks (AAC + AC-3) for 5.4.

donmelton/video-transcoding-scripts,kaychaks/video-transcoding-scripts,ferrouswheel/video-transcoding-scripts,buscarini/video-transcoding-scripts,pefoley2/video-transcoding-scripts