your suggestions for x264 encode

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C++

video

multimedia

i am a new one in x264, i was asked to use the latest x264 to make a new encoder, i want to make the encoder encode the stream much smaller because we have a bad network.
the follow is my settings :
i need your suggestions for this ,if i can not make the new one much better i may get fired

int nRet = 0 ;
   nRet = x264_param_default_preset(&m_X264Param,"slow","zerolatency") ;
   m_X264Param.i_bframe_adaptive = X264_B_ADAPT_TRELLIS ;
   m_X264Param.rc.f_vbv_buffer_init = 0.9 ;
   m_X264Param.rc.i_vbv_max_bitrate = params.nBitRate/1000 ;
    m_X264Param.rc.i_vbv_buffer_size = params.nBitRate/1000 ;
   m_X264Param.rc.i_rc_method = X264_RC_ABR ;
   m_X264Param.rc.i_lookahead = 30;
   m_X264Param.rc.f_rate_tolerance = 0.8 ;
   m_X264Param.i_bframe = 5 ;
   m_X264Param.i_bframe_pyramid = 2 ;
   m_X264Param.i_frame_reference = 8 ;
   m_X264Param.i_keyint_max = 580 ;
   m_X264Param.i_keyint_min = X264_KEYINT_MIN_AUTO ;
   m_X264Param.vui.i_transfer = 1 ;