ffmpeg如何减少解码的延迟

    av_dict_set(&optionsDict, "rtsp_transport", "udp", 0);
    av_dict_set(&optionsDict, "stimeout", "200000", 0);
    av_dict_set(&optionsDict, "fflags", "nobuffer", 0);

    if (avformat_open_input(&pFormatCtx, filepath, 0, &optionsDict) != 0) {
        printf("Couldn't open input stream. ");
        return -1;
    }

我最近还发现可以把avformat_find_stream_info()去掉，然后再补充pFormatCtx的参数加上，比如宽高等。