What is the difference between monocular video and stereo video ,as i am studying about motion tracking i need to know the meaning of these two things.
Monocular video is taken using a single camera. Stereo video is taken using two cameras side-by-side, producing two video streams. That's pretty much it.
A stereo video pair allows depth measurement, so you can find out how far away things are. However, this is not an easy task for complex scenes.