ERROR: cuda requested, but not all dependencies are satisfied: ffnvcodec

都说要如下操作，其实并不能解决。

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

主要是配置上要正确。参考：

https://quantum6.blog.csdn.net/article/details/106968971