Function ncdirect_stream 

pub unsafe extern "C" fn ncdirect_stream(
    n: *mut ncdirect,
    filename: *const c_char,
    streamer: ncstreamcb,
    vopts: *mut ncvisual_options,
    curry: *mut c_void,
) -> c_int

Load successive frames from a file, invoking ‘streamer’ on each.