@@ -338,6 +338,7 @@ int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,

     do {

         AVFilterContext *filter;

+        const char *filterchain = filters;

         filters += strspn(filters, WHITESPACES);

         if ((ret = parse_inputs(&filters, &curr_inputs, &open_outputs, log_ctx)) < 0)

@@ -365,8 +366,8 @@ int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,

         if (chr == ';' && curr_inputs) {

             av_log(log_ctx, AV_LOG_ERROR,

-                   "Could not find a output to link when parsing \"%s\"\n",

-                   filters - 1);

+                   "Invalid filterchain containing an unlabelled output pad: \"%s\"\n",

+                   filterchain);

             ret = AVERROR(EINVAL);

             goto fail;

         }