x264->param.i_csp = X264_CSP_BGRA;
	x264->param.i_log_level = X264_LOG_INFO;
    x264->param.i_threads = 8;
    x264->param.i_width = x264->width;
    x264->param.i_height = x264->height;
    x264->param.i_fps_num = 25;
    x264->param.i_fps_den = 1;
    x264->param.i_keyint_max = 50;
    x264->param.b_intra_refresh = 1;
    x264->param.rc.i_rc_method = X264_RC_CRF;
    x264->param.rc.i_vbv_buffer_size = 400;
    x264->param.rc.i_vbv_max_bitrate = 10000;
    x264->param.rc.f_rf_constant = 25;
    x264->param.rc.f_rf_constant_max = 35;
    x264->param.i_sps_id = 7;
    // the following two value you should keep 1
    x264->param.b_repeat_headers = 1;    // to get header before every I-Frame
    x264->param.b_annexb = 1;