Tracking of Non-Rigid Object (Skater) using OpenCV

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Hi all,

I am working on a project where I need to track non-rigid object (in this case a skater) using OpenCV. The skater will be skating along the ramp and the goal is to track his speed along the trajectory. There is also gap between two ramps where he will jump and I need to track his path during the jump also. We will observing the skater along side view. The skater changes his stance differently along the track. Since, the skater is skating on the ramp in a stadium, there is lot of noise/unwanted objects in the background

What would be a good approach to solve the problem in hand using OpenCV? Any suggestions are welcome.