Function av_log_format_line2 

pub unsafe fn av_log_format_line2(
    _ptr: *mut c_void,
    _level: c_int,
    _fmt: *const c_char,
    _vl: va_list,
    _line: *mut c_char,
    _line_size: c_int,
    _print_prefix: *mut c_int,
) -> c_int