Install nvdec and nvh264enc as GStreamer plugins

$ sudo apt-get install gtk-doc-tools

$ git clone -b 1.14.5 https://github.com/GStreamer/gst-plugins-bad.git

download NVIDIA Video Codec SDK

$ unzip Video_Codec_SDK_11.1.5.zip

$ cp Video_Codec_SDK_11.1.5/Interface/nvEncodeAPI.h gst-plugins-bad/sys/nvenc/

$ cp Video_Codec_SDK_11.1.5/Interface/cuviddec.h gst-plugins-bad/sys/nvdec/

$ cp Video_Codec_SDK_11.1.5/Interface/nvcuvid.h gst-plugins-bad/sys/nvdec/

$ cd gst-plugins-bad/

$ ./autogen.sh --with-cuda-prefix="/usr/local/cuda"

$ cd sys/nvenc/

$ make

$ sudo cp .libs/libgstnvenc.so /usr/lib/x86_64-linux-gnu/gstreamer-1.0/

$ cd ../nvdec

$ make

$ sudo cp .libs/libgstnvdec.so /usr/lib/x86_64-linux-gnu/gstreamer-1.0/

$ gst-inspect-1.0 nvh264enc

$ gst-inspect-1.0 nvdec