extract calibation file from image/videos

[Sondosmohamed1]

hello thank you very much for your work , am newer in this area and i have some questions , i have only image/videos from many cameras and i need to get the calibration file from theses cameras ?especially the intrinsic matrix i will suppose that the principle is the center of the image
i was trying to run the pretrained model to extract the 2 vanishing points i followed the evaluation steps at first i extracted the objects then vanishing points , but when i want to extract the calibration files i found i have to pass the two dataset why ? is it any error in my steps ?