Nvidia cuda Ubuntu 20.04

Question

I have installed cuda and cuda-toolkit-10.2 from Nvidia Cuda Toolkit repository on my Ubuntu 20.04 machine to make a custom build of FFmpeg to using NVIDIA hardware acceleration so when I try to configure the source code with recomended command:

./configure --enable-cuda-sdk --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64

I get this error:

ERROR: failed checking for nvcc.

and while I run this:

nvcc -V

It's working fine.

Solution

Finally, I downgrade my gcc and g++ to version 8 or lower, as though nvcc is not compatible with later than gcc version 8

Comments

[Ken Sharp]

Check the config.log, it will be more forthcoming.

[Amir]

thank you for your useful comment I fixed my issue by check the config log file.

[andrew.46]

@Amir You do not normally need cuda for NVidia hardware acceleration with FFmpeg, unless you have a special need?

[Daniil Mashkin]

@andrew.46 why?

[andrew.46]

@DaniilMashkin Most people are simply after simple hardware acceleration and if you compile FFmpeg against the nv-codec-headers you should be able to use your graphics card for this purpose. No need usually to install a big 'cuda' package.

[Ken Sharp]

You should be able to mark your answer as solved.