snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
scaler_count++);
- snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
+ if (graph->scale_sws_opts)
+ snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
+ else
+ snprintf(scale_args, sizeof(scale_args), "0:0");
+
if ((ret = avfilter_graph_create_filter(&convert, filter,
inst_name, scale_args, NULL,
graph)) < 0)