What MSVC library has calcOpticalFlowPyrLK()?

[tksharpless]

And how long did it take you to find out?

[berak]

you copypaste into the doc’s searchbar, and that’s it:

https://docs.opencv.org/master/dc/d6b/group__video__track.html#ga473e4b886d0bcc6b65831eb88ed93323

@tksharpless

And how long did it take you to find out?

4 seconds

What MSVC library has calcOpticalFlowPyrLK

see answer here:

How to identify the C++ link library that contains a given function?

as a “rule of thumb” – there is a library for each opencv module you use, so if you #include "opencv2/videoio.hpp you should link against opencv_videoio454.lib prebuilt libs (e.g. from SF) will also contain the “all-in-one” opencv_world454.lib which will save you from guessing (version numbers for current master, oct21)