Bulk conversion of graphics files [Solved]

[Gordon Cooper]

Has anyone found/seen anything providing bulk conversion of jpeg files to pdf? I am working on a project (two of us) recovering pages from an NZ
amateur radio magazine into a digital archive. So far about 30,000 page files. I am working with Gimp in MX but my colleague is a long time Windows man. I am handling the final collation and saving in a Cloud store, for future readers.

My problem is the conversion of a thousand (or more) jpeg files to the pdf format. This is easy one file at a time, but slow and laborious. Years ago when I used Windows, I wrote a script in Pascal, to work through a folder and do the conversion. That program will not run in linux, and I'm getting a bit old and doddery to write something in Free Pascal to do the job. Hence my request.

Any suggestions ?

Thanks,
Gordon.

[JayM]

ffmpeg could probably do it from within a shell script. Strike that, use convert instead. https://duckduckgo.com/?q=batch+convert ... 1-1&ia=web

[Geek3579]

I believe Imagemagick is installed in the latest MX-Linux OS.

You can convert all JPG images in a directory to one PDF document via the following bash one-liner if the terminal is opened in that directory: convert "*.(JPG)" -quality 150 FileOUT.PDF
(for better quality, use -quality 600)

If you wish to save the PDFs as single files, a small FOR-Done loop is required

[JayM]

I missed the bit where you wanted to convert them to pdfs. A websearch is your friend as your question isn't specific to MX Linux but applies to any distro: https://duckduckgo.com/?q=batch+convert ... 1-1&ia=web

[leekz-my]

I've seen people using command:

Code: Select all

img2pdf

AFAIK it's slightly better than imagemagick for loseless conversion.

[Stevo]

If you prefer a GUI for imagemagick batch conversion, converseen should fill the bill.

Code: Select all

Package: converseen
Version: 0.9.7.2-1
Priority: optional
Section: graphics
Maintainer: Laszlo Boszormenyi (GCS) <gcs@debian.org>
Installed-Size: 1,121 kB
Depends: libc6 (>= 2.14), libgcc1 (>= 1:3.0), libmagick++-6.q16-8, libmagickcore-6.q16-6 (>= 8:6.9.10.2), libqt5core5a (>= 5.11.0~rc1), libqt5gui5 (>= 5.8.0), libqt5network5 (>= 5.0.2), libqt5widgets5 (>= 5.11.0~rc1), libstdc++6 (>= 5.2)
Homepage: https://converseen.sourceforge.net/
Tag: uitoolkit::qt
Download-Size: 284 kB
APT-Manual-Installed: yes
APT-Sources: http://deb.debian.org/debian buster/main amd64 Packages
Description: batch image converter and resizer
 You can convert an unlimited number of images and / or create thumbnails
 to any of the most popular formats: DPX, EXR, GIF, JPEG, JPEG-2000, PDF,
 PhotoCD, PNG, Postscript, SVG, and TIFF.
 .
 Thanks to the Magick++ image libraries it supports more than 100 image
 formats.

[Gordon Cooper]

Many thanks for the replies. Will work on it today.

[Geek3579]

Sorry Gordon, I checked in better light and found that I had misread my notes:
The batch conversion using ImageMagick should have used CURLY Brackets: convert "*.{JPG}" -quality 150 FileOUT.PDF

But while I'm on the topic of ImageMagick I will also add that you can combine a batch of individual PDF's into one: convert -density 150 *.PDF Output.PDF

Converseen ??? Gee, I must check that out !!