Re: [Gimp-user] Free software for Batch file conversion

[Steve Kinney <admin pilobilus net>]

On 05/27/2018 02:24 PM, Steve Kinney wrote:

[...]

> Or if you are using an operating system that supports it, and your
> images are whole pages, imagemagick might do the trick way more simply
> and quickly.  On Linux I have used it to convert scanned pages to PDF.
> The images will appear as pages in alphabetical order, so add 01, 02,
> etc to the front of their names if needed.  Then...
>
> 1.  Examine the images, determine a good target width for all of them.
>
> 2.  Edit images if/as required.
>
> 3.  If necessary equalize image widths via:  mogrify -resize [pixels] *.jpg
>
> *NOTE* Assure that all images have the same DPI value, use "mogrify
> -density [DPI] *.jpg" (or png, etc.) if required.
>
> 4.  To convert all images in a directory to one pdf file, do:
>
> convert *.jpg [output].pdf
>
> With a large number of pages, the process tends to hang.  In that case,
> this script has done the trick for me.  Copy and save the text below as
> a plain text file, put it in your home directory's /bin folder and set
> it as executable (chmod +x [script-name.scr]).  Then put the images in
> one directory (anywhere), open a terminal there and type the name of
> your script to run it against your images:
>
> #!/bin/sh
> # convert large number of .jpg files to one PDF file.  Equalize widths
> of .jpg files first via: mogrify -resize [pixels] *.jpg
>
> for f in *.jpg;
> do
> convert "$f" "${f%.jpg}.pdf"
> done
> pdftk *.pdf cat output combined.pdf/

I forgot:  Requires imagemagic (of course) and, if using the script,
also pdftk ("PDF Toolkit).  You might need to install them, but if so
the are in the repos so that should present no problem - use your
package manager, or appropriate terminal commands.  For instance, on
Debian family systems (Ubuntu, Mind) do:

sudo apt-get install imagemagick pdftk

:o)