How do I convert a series of PNGs to an OBJ or other 3D format?

I have a couple thousand (~13,000) images (named frame0.png, frame1.png, etc.) that I need to convert to a 3D format.

The X and Y of the images will stay on the X and Y of the 3D object file, but the Z axis will correlate to the frame number. (as I said earlier, they are named frameX.png where X is the frame number [without padding])

I would like to do this programmatically but it dosen’t really matter, it’s just preference.