deepstream编译gst-plugins下的gst-dsexample插件出现找不到opencv4和gstbasetransform.h: No such file or directory

最近在deepstream编译gst-plugins下的gst-dsexample插件
使用命令

$:~/deepstream_workspace/src/deepstream_detection/deepstream/gst-plugins/gst-dsexample$ sudo make CUDA_VER=10.2 install 

出现下述错误：

xxxxx@xxxxx-m:~/deepstream_workspace/src/deepstream_detection/deepstream/gst-plugins/gst-dsexample$ sudo make CUDA_VER=10.2 install
[sudo] password for xxxxx:
Package opencv4 was not found in the pkg-config search path.
Perhaps you should add the directory conta