diff --git a/libavfilter/defaults.c b/libavfilter/defaults.c
index 570d21defd..9976560106 100644
--- a/libavfilter/defaults.c
+++ b/libavfilter/defaults.c
@@ -103,6 +103,16 @@ int avfilter_default_config_output_link(AVFilterLink *link)
     return 0;
 }
 
+/**
+ * default config_link() implementation for input video links to simplify
+ * the implementation of one input one output video filters */
+int avfilter_default_config_input_link(AVFilterLink *link)
+{
+    if(!link->dst->output_count)
+        return 0;
+    return avfilter_config_link(link->dst->outputs[0]);
+}
+
 /**
  * default query_formats() implementation for output video links to simplify
  * the implementation of one input one output video filters */