The amount of saved rendered images doesn't match the amount of corresponding saved poses in SIBR

[starlighttt123]

Hello, in my case, I need to save each rendered images as well as its corresponding poses, however when I use "save frames" and "save path" button in SIBR, the number of saved images is always one more than the number of saved poses in saved 【cameras.txt】and 【images.txt】, which make me much confused.
Any help would be much appreciated！