Including a jpg image, source code compilation in pdflatex doesn't create pdf

Question

I'm writing a report on a programming project in LaTeX and need to insert some images. I created images using a Finite Element program Freefem++, and saved the results in image files. I've tried png, jpeg, eps, and ps, but would like to use jpg, and none of them work so far. I've searched all over the internet, and it seems like my code should work, so I'm not sure what I'm missing.

\documentclass[a4paper,11pt]{article}

\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage[pdftex]{graphicx}
%\graphicspath{{images/}}
 \DeclareGraphicsExtensions{.pdf,.jpeg,.png,.jpg}   

\usepackage[english]{babel}
\begin{document}

\section*{Introduction}
\addcontentsline{toc}{section}{Introduction}


The domain considered will be

\begin{figure}
\begin{center}
\includegraphics{domain.jpg}
\end{center}
\end{figure}

\end{document}

I've tried with the file in a folder images and in the same folder as the doc, I've tried with and without the file extension, with and without [pdftex] and \DeclareGraphicsExtensions, etc. It compiles with pdflatex and gives no errors, exit code 1, then when I try to view the pdf it says it doesn't exist, and asks if I've compiled the source code. If I compile with pdftex, it just creates a blank first page. I've tried everything I can think of, I don't know what I'm missing. Perhaps a package I need to install on my computer? Or just a stupid mistake in the code? Does anyone see my error? Thanks in advance!

Answer 1

The problem: apparently Freefem++ creates .jpg, .png, etc. images that are not readable by LaTeX. Thanks to the comments above telling me it was a problem with the image, I decided to try converting it to .jpeg (other formats probably would have worked as well, but I wanted jpg). To do this, I installed the ImageMagick package from terminal in linux, then used the convert command to create domain.jpeg:

$ convert domain.JPG domain.jpeg

This made the image usable, after that it was just formatting to get it to look right.

Answer 2

I stumbled on the same error with pandoc when trying to convert epub to pdf :

[macfarlane@boulder]:(~/Documents)$ pandoc -s -t latex --toc --chapters \
    --latex-engine=lualatex $BOOK.epub -o $BOOK.pdf
!LuaTeX error (file /tmp/tex2pdf.23440/3f21bef8dd2877aad72f5cddbf00284ca88fa0e7
.jpg): reading JPEG image failed (no marker found)
 ==> Fatal error occurred, no output PDF file produced!

pandoc: Error producing PDF
[macfarlane@boulder]:(~/Documents)$ 

Here's a workaround. Check to see if a tex file can be produced :

[macfarlane@boulder]:(~/Documents)$ pandoc \
    -s -t latex \
    --toc --chapters \
    --latex-engine=lualatex $BOOK.epub -o $BOOK.tex
[macfarlane@boulder]:(~/Documents)$ 

Extract images and other media contained in the epub container to the path DIR, creating it if necessary, and adjust the images references in the [LaTeX] document so they point to the extracted files, with the option --extract-media= DIR . Select the current directory which also contains the ePub file. Add --extract-media=. which means extract in the current directory, which is also $HOME/Documents

[macfarlane@boulder]:(~)$ cd Documents
[macfarlane@boulder]:(~/Documents)$ pandoc \
    -s -t latex \
    --toc --chapters \
    --latex-engine=lualatex \
    --extract-media=. $BOOK.epub -o $BOOK.tex
pandoc: extracting ./images/9781501144158.jpg
pandoc: extracting ./images/com-01.jpg
pandoc: extracting ./images/f0003-01.jpg
pandoc: extracting ./images/f0005-01.jpg
[ ----- extract-media logging shortened ---- ]
pandoc: extracting ./images/f0177-01.jpg
pandoc: extracting ./images/f0187-01.jpg
pandoc: extracting ./images/logo.jpg
pandoc: extracting ./images/logo1.jpg
pandoc: extracting ./images/title.jpg
[macfarlane@boulder]:(~/Documents)$ 

Repeal the extracted .jpg images by creating new LaTeX compatible JPEG images with the `convert' utility (from the imagemagick program suite)

[macfarlane@boulder]:(~/Documents)$ cd images
[macfarlane@boulder]:(~/Documents/images)$ convert logo1.jpg logo1.jpeg 

and Replace the previously with pandoc extracted .jpg images with the newly created .jpeg images :

[macfarlane@boulder]:(~/Documents/images)$ mv logo1.jpeg logo1.jpg 

One can do this with a single for loop on the commandline :

[macfarlane@boulder]:(~/Documents)$ 
[macfarlane@boulder]:(~/Documents)$ cd images/
[macfarlane@boulder]:(~/Documents/images)$ for i in *.jpg; do convert $i `echo $i | sed 's/jpg/jpeg/'`; done
[macfarlane@boulder]:(~/Documents/images)$ rm -f *.jpg
[macfarlane@boulder]:(~/Documents/images)$ for i in *.jpeg; do mv $i `echo $i | sed 's/jpeg/jpg/'`; done 
[macfarlane@boulder]:(~/Documents/images)$ cd ..
[macfarlane@boulder]:(~/Documents)$ 

Run the first commandline again, but this time have the LuaTeX engine seek for its \includegraphics in the same directory as where the ePub images were extracted earlier ( --data-dir=DIRECTORY Specify the user data directory to search for pandoc data files. If this option is not specified, the default user data directory will be used. This is, in Unix: $HOME/.pandoc ) by adding the option --data-dir=. :

[macfarlane@boulder]:(~/Documents)$ pandoc \
    -s -t latex \
    --toc --chapters \
    --latex-engine=lualatex \
    --data-dir=. $BOOK.epub -o $BOOK.pdf
[macfarlane@boulder]:(~/Documents)$