imagemagick globbing multiple extensions

Question

I have a folder containing photos coming from different cameras.

I use Imagemagick to convert to resized and renamed photos in another folder.

Something like this:

convert "*.jpg" \
    -resize 640 -scene 1 \
    "${folder}/${prefix}_%02d.jpg"

The problem is some cameras save photos with "JPG" extension, others with "jpg".

To solve this I used to rename extensions with this:

rename .JPG .jpg *.JPG 2> /dev/null

This won't work on filesystems where I have only read access. How do I glob in IM both *.jpg and *.JPG files?

Thanks for your help

Answer 1

I got it:

convert "*.{jpg,JPG}" \
    -resize 640 -scene 1 \
    "${folder}/${prefix}_%02d.jpg"

from here