1 files changed, 3 insertions, 1 deletions
diff --git a/libavfilter/internal.h b/libavfilter/internal.h
index 3a2d50d65c..6f868ae89f 100644
--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -98,8 +98,10 @@ struct AVFilterPad {
      * in the link structure during start_frame().
      *
      * Input video pads only.
+     *
+     * @return >= 0 on success, a negative AVERROR on error.
      */
-    void (*end_frame)(AVFilterLink *link);
+    int (*end_frame)(AVFilterLink *link);
 
     /**
      * Slice drawing callback. This is where a filter receives video data