SDK's cudaEncode--for your help want to delete SEI

My job is to accelerate H.264 encoding using GPU with nVidia CUDA.
I take the src example cudaEncode as my studying object in SDK 3.2.
configuration :IPPP,High Profile,slicecount=1
Now I has a problem:How to delete SEI infomation?Is SEI configurable??
Evey IDR frame has two SEIs(pic_timing+buffering_period), P has just one SEI(pic_timing).

Kind regards.