Computes the length of a given playlist.
$ playlist-duration foo.mp3 bar.flac my_directory/
Format supported: - mp3 - flac - ogg (Vorbis + Opus) - m3u : Caution, m3u is implemented naively. Recursive m3u playlists should not be used. Also, it manages only paths and not urls, to avoid downloading the whole file just to know its duration.