@@ -168,8 +168,10 @@ void show_help_options(const OptionDef *options, const char *msg, int mask,

 void show_help_children(const AVClass *class, int flags)

 {

     const AVClass *child = NULL;

-    av_opt_show2(&class, NULL, flags, 0);

-    printf("\n");

+    if (class->option) {

+        av_opt_show2(&class, NULL, flags, 0);

+        printf("\n");

+    }

     while (child = av_opt_child_class_next(class, child))

         show_help_children(child, flags);