How to save the full image from the result of detected video rtsp stream

I am using yolov7.

I am detecting 49 same objects per frame on rstp stream.

I need to write 1 image.jpg per frame or 1 image in 5 second of rstp stream with no bounding boxes.
save_crop gives me 49 images per frame which is not what I want.

I hope I was fully clear with my issue.

Thanks