- * @param inputs linked list to the inputs of the graph
- * @param outputs linked list to the outputs of the graph
+ * @param inputs linked list to the inputs of the graph, may be NULL.
+ * It is updated to contain the list of open inputs after the parsing,
+ * should be freed with avfilter_inout_free().
+ * @param outputs linked list to the outputs of the graph, may be NULL.
+ * It is updated to contain the list of open outputs after the parsing,
+ * should be freed with avfilter_inout_free().