@@ -36,13 +36,13 @@ void avfilter_graph_destroy(AVFilterGraph *graph)

 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)

 {

-    graph->filters = av_realloc(graph->filters,

-                                sizeof(AVFilterContext*) * ++graph->filter_count);

-

-    if (!graph->filters)

+    AVFilterContext **filters = av_realloc(graph->filters,

+                                           sizeof(AVFilterContext*) * (graph->filter_count+1));

+    if (!filters)

         return AVERROR(ENOMEM);

-    graph->filters[graph->filter_count - 1] = filter;

+    graph->filters = filters;

+    graph->filters[graph->filter_count++] = filter;

     return 0;

 }