# Ref/Attrib: [1] Convert audio file to FLAC with ffmpeg? https://superuser.com/a/802126
 #             [2] How to specify flac compression level when converting with avconv? https://askubuntu.com/questions/544651/
 #             [3] How can I extract audio from video with ffmpeg? https://stackoverflow.com/a/27413824
 # Ref/Attrib: [1] Convert audio file to FLAC with ffmpeg? https://superuser.com/a/802126
 #             [2] How to specify flac compression level when converting with avconv? https://askubuntu.com/questions/544651/
 #             [3] How can I extract audio from video with ffmpeg? https://stackoverflow.com/a/27413824