Video Visitor Counting

Question

Video

There is a task - to count the visitors of the shopping center by the video stream from the surveillance camera at the entrance.
Prompt software or cloud service with which it can be implemented.

Answer 1

There are some, but they are probably more expensive.
www.sensourceinc.com/peoplecounters.htm
Here's another
www.infodev.ca/buildings/products-and-people-counters.html
www.peoplecounting.co.uk/
Looking at their principle of operation, I think you can make your own piece of iron.
There are also Russian ones:
www.antivor.ru/goodslist.aspx?ID=25
rstat.ru/
www.watcom.ru/

Answer 2

www.profintegro.com/ - they say a very good company