main.rs

fn main() {
    let matches = App::new("aconv")
        .setting(AppSettings::TrailingVarArg)
        .arg(
            Arg::with_name("codec")
                .short("c")
                .required(true)
                .takes_value(true),
        )
        .arg(
            Arg::with_name("rest")
                .multiple(true)
                .allow_hyphen_values(true),
        )
        .get_matches();

    println!("{:?}", matches);
}