Is it possible to use DSLR cameras like a Nikon, Canon, etc.?
I don't see any difference between DSLR cameras and action cameras here. Both can save data on an SD card.

Sure, you can use any cameras for offline recording. Provided all the cameras record with the same resolution and frame rate. Action cameras are recommended just because they usually provide higher FPS. And this is the main reason to use the offline workflow which is less convenient than live recording.