OK that makes sense what they are saying was probably true in 2018 but it is not since at least 2020, if you stick to the OpenCV 4.5 and above you should be fine. As a side note, they’re talking about CUDA SDK version 7 which is really old not compute capability 7 devices so you should be fine there aswell. If you decide to build cudacodec and are having any issues then I can provide you with build instructions if you want?