How to massively resize images?

Question

linux

Good afternoon.
I need to massively increase the size of pictures in a folder. But the pictures are in different subfolders.
The only thing I know about them is that there is 970 in the title, this figure is added to the necessary pictures.
I need to somehow pull out all the pictures from the folder and subfolders, the title of which contains 970 and increase it to a minimum size of 400 pixels on the smaller side.
Yes, and you need to write in the same place, under the same name.
For example, there is a picture 37.970.jpg, 250x200 in size.
It should make 37.970.jpg, 500x400 in size.

Answer 1

Something like this, using www.imagemagick.org (installed from packages)

find /myfolder -name "*970.jpg" -exec  mogrify -resize 256x256 {} \;