Cargo Features

[dependencies]
pf_lib = { version = "3.0.0", default-features = false, features = ["flv", "mp4", "wmv"] }
default = mov, mp4

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

avi flv
mov mp4 default
mpeg webm wmv

pf_lib has 4 features without comments.