Assignment

unoconv doesn't support .jpeg ... but does support .jpg

.jpeg files are not .jpg's.

So ... you could try the following ...

Use the following mysql query to find where these .jpeg files are located in
the sea of files in moodledata/filedir/

mysql> select contenthash,filename from mdl_files where filename like '%.jpeg';

The contenthash value can be used to find the file in moodledata/filedir/
from command line.

cd /path/to/moodledata/filedir/
find ./ -name [contenthash]

That will take some time to run but one will see something like:
/xx/yy/contenthash

To make sure it's the right mime type:

file -b /xx/yy/contenthash

Ok, now the tricky parts ....

*copy* the /xx/yy/contenthash out of moodledata/filedir/ and put that copy
out to a web accessible directory (in this example, /var/www/html/img2convert/

cp /xx/yy/contenthash /var/www/html/img2convert/[filename].jpeg

Download and use local app to convert to .jpg

Or if you have imagemagick installed could try:

convert filename.jpeg filename.jpg

Upload the converted [filename].jpg to /var/www/html/imgconverted/

Or if imagemagick worked, cp the converted .jpg using below

From /var/www/html/imgconverted/ directory copy and replace the old contenthash name file:

cp [filename].jpg /path/to/moodledata/filedir//xx/yy/contenthash

From /var/www/html/imgconverted/ directory copy and replace the old contenthash name file:

cp [filename].jpg /path/to/moodledata/filedir//xx/yy/contenthash

In the DB mdl_files change filename from .jpeg to .jpg

now go to whatever to see if assignment can convert the file to pdf.

Fingers crossed!

'SoS', Ken

Hopefully, you have command line access to your server.

IF you do, what does the following commands show?

/usr/bin/unoconv --version

/usr/bin/unoconv --show

On the server am using to explore this issue, mine shows a section

The following list of graphics formats are currently available:

  bmp      - Windows Bitmap [.bmp]
  emf      - Enhanced Metafile [.emf]
  eps      - Encapsulated PostScript [.eps]
  fodg     - OpenDocument Drawing (Flat XML) [.fodg]
  gif      - Graphics Interchange Format [.gif]
  html     - HTML Document (OpenOffice.org Draw) [.html]
  jpg      - Joint Photographic Experts Group [.jpg]
  met      - OS/2 Metafile [.met]
  odd      - OpenDocument Drawing [.odd]
  otg      - OpenDocument Drawing Template [.otg]
  pbm      - Portable Bitmap [.pbm]
  pct      - Mac Pict [.pct]
  pdf      - Portable Document Format [.pdf]
  pgm      - Portable Graymap [.pgm]
  png      - Portable Network Graphic [.png]
  ppm      - Portable Pixelmap [.ppm]
  ras      - Sun Raster Image [.ras]
  std      - OpenOffice.org 1.0 Drawing Template [.std]
  svg      - Scalable Vector Graphics [.svg]
  svm      - StarView Metafile [.svm]
  swf      - Macromedia Flash (SWF) [.swf]
  sxd      - OpenOffice.org 1.0 Drawing [.sxd]
  sxd3     - StarDraw 3.0 [.sxd]
  sxd5     - StarDraw 5.0 [.sxd]
  sxw      - StarOffice XML (Draw) [.sxw]
  tiff     - Tagged Image File Format [.tiff]
  vor      - StarDraw 5.0 Template [.vor]
  vor3     - StarDraw 3.0 Template [.vor]
  wmf      - Windows Metafile [.wmf]
  xhtml    - XHTML [.xhtml]
  xpm      - X PixMap [.xpm]

So what if, you renamed a .jpeg file and changed extension to .jpg

[root@server ~]# /usr/bin/soffice --version
LibreOffice 5.3.6.1 30(Build:1)

'SoS', Ken

Excelente Gracias