e = av_dict_get(meta, "sig", NULL, 0);
av_log(NULL, AV_LOG_INFO, "got \"%s\" (%p)\n", e->value, msg.frame);
av_frame_free(&msg.frame);
e = av_dict_get(meta, "sig", NULL, 0);
av_log(NULL, AV_LOG_INFO, "got \"%s\" (%p)\n", e->value, msg.frame);
av_frame_free(&msg.frame);