Creating video effects for analysis of football matches (cursor, like in football simulators)?

Question

Video processing

I wanted to achieve something like this (cursor over the player and circle, as in football simulators - FIFA).
youtu.be/R_4iXvJs1ZI
What program (and how) can create video effects:

1. Circle the player
2. Cursor over player
3. Select a zone on the football field
4. Arrows to show directions
5. Show the route of the player's movement (example in the video from 51 sec)

Is it possible to programmatically (from code) apply effects over video dynamically (C# or Qt).
Thank you!

Answer 1

Qt has a QMediaplayer class and a QVideoWidget class.
The easiest in my opinion is to create a separate widget that draws on top of QVideoWidget. In this very widget, you can draw anything you want by overriding the paintEvent method.
Automating the selection of a player is not a problem or an open zone is not a problem. But it is most likely that it will not be possible to automate the highlighting of the player of interest and the open area of ​​interest. A man should sit here and choose with his hands.
PS Recognition of objects in the image is no longer done by Qt, but by OpenCV