Install GPU ffmpeg in Ubuntu 18.04

build_ffmpeg_gpu.sh

sudo apt purge ffmpeg
sudo apt purge libavcodec-dev libavformat-dev libswscale-dev
sudo apt autoremove --purge

sudo apt install build-essential cmake git unzip wget locate
sudo apt-get install yasm libnuma1 libnuma-dev

git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git
cd nv-codec-headers && sudo make install && cd -

git clone https://git.ffmpeg.org/ffmpeg.git && cd ffmpeg
./configure --enable-nonfree --enable-cuda-nvcc --enable-libnpp --enable-pic --enable-shared \
            --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
make -j8
sudo make install

ffmpeg
sudo updatedb && locate libavformat. libavcodec. libswscale. | grep -P "(\.so|\.a)"