About nerf_target_camera_extrinsic and nerf_next_target_camera_intrinsic

[DingChunQ]

I want to ask, do data['intr']: intrinsic matrix and data['extr']: c2w matrix refer to the camera's internal and external parameter matrices? Are the angle and position of the rendered image determined by them?
During training, will these two values ​​change or are they fixed?