Computer Vision Person Detection

i need to make a person detection in which a video will be uploaded its a fixed footage no moment and it need to detect the persons give them correct id and count them even if they gets blocked and also gets out of frame and comes again teh same id should be used also i want to count how many people went in and out of that using the virtual line and all can anyone guide me on which model to choose or what all algorithm to choose any open source model is enough yolo,rtdetr,cnn or anything i am new to this and want to do this project so how to do this guys any guidance submitted by /u/Any-Passag