diff --git a/libavfilter/video.c b/libavfilter/video.c
index dfcfbb738784635000301465b1747ab626dcff5d..dce3478ea5b8cf40d6d178adf949fa9bbad9dca0 100644
--- a/libavfilter/video.c
+++ b/libavfilter/video.c
@@ -164,6 +164,8 @@ static void default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
     if (outlink) {
         outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
         avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
+        outlink->out_buf->video->w = outlink->w;
+        outlink->out_buf->video->h = outlink->h;
         ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
     }
 }