Cargo Features

[dependencies]
playlist-duration = { version = "0.1.9", default-features = false, features = ["mp3", "flac", "ogg", "m4a", "m3u"] }
default = flac, m3u, m4a, mp3, ogg

These default features are set whenever playlist-duration is added without default-features = false somewhere in the dependency tree.

mp3 default = mp3-duration
flac default = metaflac
ogg default = ogg_metadata
m4a default = mp4ameta

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

mp3-duration mp3
metaflac flac
ogg_metadata ogg
m3u default
mp4ameta m4a