char *avfilter_graph_dump(AVFilterGraph *graph, const char *options)
{
AVBPrint buf;
- char *dump;
+ char *dump = NULL;
- av_bprint_init(&buf, 0, 0);
+ av_bprint_init(&buf, 0, AV_BPRINT_SIZE_COUNT_ONLY);
avfilter_graph_dump_to_buf(&buf, graph);
av_bprint_init(&buf, buf.len + 1, buf.len + 1);
avfilter_graph_dump_to_buf(&buf, graph);