1 files changed, 11 insertions, 0 deletions
diff --git a/libavutil/frame.h b/libavutil/frame.h
index 4f63fb0249..f9ffb5bbbf 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -395,6 +395,17 @@ typedef struct AVFrame {
     /**
      * @}
      */
+
+    /**
+     * AVBufferRef for free use by the API user. Libav will never check the
+     * contents of the buffer ref. Libav calls av_buffer_unref() on it when
+     * the frame is unreferenced. av_frame_copy_props() calls create a new
+     * reference with av_buffer_ref() for the target frame's opaque_ref field.
+     *
+     * This is unrelated to the opaque field, although it serves a similar
+     * purpose.
+     */
+    AVBufferRef *opaque_ref;
 } AVFrame;
 
 /**