Hi I was following the example in this video https://www.youtube.com/watch?v=BCJYorKIlN8&t=78s. To build the code in this example I need OpenCV 3.4.1 tracking.hpp which I understand can be found at https://github.com/opencv/opencv_contrib/tree/3.4.10 I was using this tutorial to combine the two https://www.youtube.com/watch?v=_fqpYLM6SCw&t=622s adding tracking to the final cmake file. This seems to work fine and building the output of the cmake file seems to go without a hitch, but when I build the code here https://www.youtube.com/watch?v=BCJYorKIlN8&t=78s I am getting a bunch of LNK2019 and LNK2001 errors. I am not sure how to address these errors and any help would be appreciated. Thanks