x264_param_default_preset(
	&x264->parameters, "ultrafast", "zerolatency+fastdecode");

	// parameter setup
	x264->parameters.i_csp					= X264_CSP_I420;
	x264->parameters.i_log_level			= X264_LOG_INFO;
	x264->parameters.i_threads				= 4;
	x264->parameters.b_sliced_threads		= 1;
	x264->parameters.i_width 				= screen_dim.bw;
	x264->parameters.i_height				= screen_dim.h;
	x264->parameters.i_fps_num				= 60;
	x264->parameters.i_fps_den				= 1;
	x264->parameters.i_keyint_max			= 250;
	x264->parameters.b_intra_refresh		= 1;
	x264->parameters.rc.i_rc_method			= X264_RC_CRF;
	x264->parameters.rc.i_vbv_buffer_size	= 100;
	x264->parameters.rc.i_vbv_max_bitrate 	= 7000;
	x264->parameters.rc.i_bitrate			= 7000;
	x264->parameters.rc.f_rf_constant		= 30;
	x264->parameters.i_sps_id				= 7;
	x264->parameters.i_slice_max_size		= 1400;
	x264->parameters.b_repeat_headers		= 1;
	x264->parameters.b_annexb 				= 1;
	x264->parameters.b_opencl 				= 1;

	x264_param_apply_profile(&x264->parameters, "baseline");