+/**
+ * Iterate over all registered filters.
+ *
+ * @param opaque a pointer where libavfilter will store the iteration state. Must
+ * point to NULL to start the iteration.
+ *
+ * @return the next registered filter or NULL when the iteration is
+ * finished
+ */
+const AVFilter *av_filter_iterate(void **opaque);
+
+#if FF_API_NEXT