diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 959fbf7fa3..7ae8a37ed6 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -406,13 +406,9 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
 
                     snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
                              scaler_count++);
-                    av_strlcpy(scale_args, "0:0", sizeof(scale_args));
-                    if (graph->scale_sws_opts) {
-                        av_strlcat(scale_args, ":", sizeof(scale_args));
-                        av_strlcat(scale_args, graph->scale_sws_opts, sizeof(scale_args));
-                    }
+
                     if ((ret = avfilter_graph_create_filter(&convert, filter,
-                                                            inst_name, scale_args, NULL,
+                                                            inst_name, graph->scale_sws_opts, NULL,
                                                             graph)) < 0)
                         return ret;
                     break;
diff --git a/libavutil/pixdesc.h b/libavutil/pixdesc.h
index f411558b44..97807231c2 100644
--- a/libavutil/pixdesc.h
+++ b/libavutil/pixdesc.h
@@ -180,7 +180,8 @@ char *av_get_pix_fmt_string (char *buf, int buf_size, enum AVPixelFormat pix_fmt
 
 /**
  * Return the number of bits per pixel used by the pixel format
- * described by pixdesc.
+ * described by pixdesc. Note that this is not the same as the number
+ * of bits per sample.
  *
  * The returned number of bits refers to the number of bits actually
  * used for storing the pixel information, that is padding bits are