ffmepg 指定网络连接模式UDP还是TCP

    AVFormatContext *formatCtx = NULL;
    formatCtx = avformat_alloc_context();
    
    AVDictionary* options = NULL;
    av_dict_set(&options, "rtsp_transport", "tcp", 0);
    
    avformat_open_input(&formatCtx, pszURLPath, NULL, &options) < 0);