Function ffmpeg_sys_next::av_opt_get_key_value

pub unsafe extern "C" fn av_opt_get_key_value(
    ropts: *mut *const c_char, 
    key_val_sep: *const c_char, 
    pairs_sep: *const c_char, 
    flags: c_uint, 
    rkey: *mut *mut c_char, 
    rval: *mut *mut c_char
) -> c_int