Recursive conversion of jpeg files

Question

I use this commandline to convert jpegs to pdfs inside a folder.

for f in *.jpg; do  echo "Converting $f"; convert "$f" "$(basename "$f" .jpg).pdf"; done

However, I would like to convert all .jpg from several folders to .pdf located inside the samefolder. I need a bash command which says "go inside folder A, launch the conversion to pdf and when it is done, go to folder B and do the same".

Also jpeg file could be ended by .jpg or .JPG.

My folder structure is such as:

Folder A
    File1.jpg
    File1.jpg
    File1.jpg
    File1.jpg
    File1.jpg
Folder B
    File1.jpg
    File1.jpg        
    File1.jpg
    ...

Any idea about how to achieve this?

Answer 1

Updated to allow file names *.jpg and *.JPG according to updated question:
Use -iname for case insensitive comparison, and variable expansion with pattern ${file%.[jJ][pP][gG]}. This will actually match .jpg in any capitalization, e.g. .JpG.

Assuming Folder A and Folder B are in the current directory and you want to do the same in all directories recursively:

find . -type f -iname \*.jpg | while read -r file
do
    echo "Converting $file"
    convert "$file" " ${file%.[jJ][pP][gG]}.pdf"
done

Or if you want to specify the directory names

find "Folder A" "Folder B" type f -iname \*.jpg | ...

If you don't have any subdirectories named *.jpg you can leave out the -type f.

If you don't want to do the conversion recursively in subdirectories of Folder A etc. you might have to add a -maxdepth condition.

Answer 2

What you have asked for is not a recursive operation, so it can be handled by a trivial adaptation of your original code:

for f in */*.jpg */*.JPG; do echo "Converting $f"; convert "$f" "${f%.*}.pdf"; done

If this is for production code rather than a quick one-off I would protect the possibility that there were no jpg or JPG files, or that the PDF had already been generated. Add or tweak to your satisfaction, of course:

for f in */*.jpg */*.JPG
do
    if [[ -f "$f" ]] && [[ ! -f "${f%.*}.pdf" ]]
    then
        echo "Converting $f"
        convert "$f" "${f%.*}.pdf"
    fi
done