rt->asf_ctx->pb = &pb;
av_dict_set(&opts, "no_resync_search", "1", 0);
ret = avformat_open_input(&rt->asf_ctx, "", &ff_asf_demuxer, &opts);
av_dict_free(&opts);
rt->asf_ctx->pb = &pb;
av_dict_set(&opts, "no_resync_search", "1", 0);
ret = avformat_open_input(&rt->asf_ctx, "", &ff_asf_demuxer, &opts);
av_dict_free(&opts);