trait Encoder 

pub trait Encoder {
    // Required method
    fn encoder(self) -> Option<Codec>;
}

必需方法

fn encoder(self) -> Option<Codec>

对外部类型的实现

impl Encoder for &str

fn encoder(self) -> Option<Codec>

impl Encoder for Option<Codec>

fn encoder(self) -> Option<Codec>

实现者

impl Encoder for Id

impl Encoder for Audio

impl Encoder for Codec

impl Encoder for Video