Ubuntu FFmpeg with CUDA11.0

setupFFmpegCUDA.sh

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

git clone https://github.com/FFmpeg/FFmpeg.git
cd FFmpeg
# Manually modify nvccflags_default 
./configure --enable-nonfree \
--enable-cuda-nvcc \
--enable-libnpp \
--enable-pic \
--enable-shared \
--enable-cuvid \
--enable-nvenc \
--extra-cflags=-I/usr/local/cuda-11.0/include \
--extra-ldflags=-L/usr/local/cuda-11.0/lib64

make -j4
sudo make install