pub unsafe extern "C" fn avio_open_dir(
s: *mut *mut AVIODirContext,
url: *const c_char,
options: *mut *mut AVDictionary,
) -> c_int
pub unsafe extern "C" fn avio_open_dir(
s: *mut *mut AVIODirContext,
url: *const c_char,
options: *mut *mut AVDictionary,
) -> c_int