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Showing content from https://www.mediawiki.org/wiki/Manual:How_to_use_DjVu_with_MediaWiki below:

Manual:How to use DjVu with MediaWiki

DjVu redirects here. This page explains how MediaWiki could work with DjVu. For help page on how to create a DjVu file from a PDF, see Creating a DjVu file.

• Manual:$wgDjvuDump — Path of the djvudump executable.
• Manual:$wgDjvuOutputExtension — File extension for the DjVu post processor output.
• Manual:$wgDjvuPostProcessor — Path of the DjVu post processor.
• Manual:$wgDjvuRenderer — Path of the ddjvu DjVu renderer.
• Manual:$wgDjvuTxt — Path of the djvutxt executable.

For

, run the following command to install all the necessary packages.

docker compose exec -u 0 mediawiki bash -c 'apt update && apt install djvulibre-bin netpbm'

• Install DjVuLibre:

  − Download the DjVuLibre package (which includes "djvudump" and "ddjvu" files). And, in the path:

  ./configure
  make
  make install
  

  − Or use aptitude or Synaptic in Debian derivatives (package djvulibre-bin)

• Install netpbm and netpbm-progs packages (use aptitude or Synaptic in Debian derivatives)
• Finally, add (or modify) the code lines below in the LocalSettings.php file (not in the DefaultSettings.php):

  $wgFileExtensions[] = 'djvu';
  $wgDjvuDump = "djvudump";
  $wgDjvuRenderer = "ddjvu";
  $wgDjvuTxt = "djvutxt";
  $wgDjvuPostProcessor = "pnmtojpeg";
  $wgDjvuOutputExtension = 'jpg';
  

• For better thumbnails quality:

  $wgDjvuPostProcessor = "ppmtojpeg -quality=100";
  

• Can also use png thumbnails with:

$wgDjvuPostProcessor = "pnmtopng";
$wgDjvuOutputExtension = 'png';

1. Download the DjVuLibre software (which includes "djvudump.exe" and "ddjvu.exe" files).
2. Install in C:\DjVuLibre (for example).
3. Download the NetPbm complete package (which includes "pnmtojpeg.exe", "pnmtopng.exe", ... files).
4. Install in "C:\GnuWin32\NetPbm"
5. Add C:\GnuWin32\NetPbm\bin to the Windows PATH Environment Variable (and reboot the computer).
6. Finally, add (or modify) the code lines below in the LocalSettings.php file (not in the DefaultSettings.php):

$wgFileExtensions[] = 'djvu';
$wgDjvuDump = 'C:/DjVuLibre/djvudump.exe';
$wgDjvuRenderer = 'C:/DjVuLibre/ddjvu.exe';
$wgDjvuTxt = 'C:/DjVuLibre/djvutxt.exe';
#$wgDjvuPostProcessor = 'pnmtojpeg.exe';
$wgDjvuOutputExtension = 'jpg';

PHP needs memory to create thumbnails: this means a high "memory_limit" (~ 128MB) in the php.ini.

1. Install djvu and netpbm using the Homebrew package manager.

brew install djvulibre netpbm

1. Follow last step of install on GNU/Linux

• How to install DjVuLibre, Qt and netpbm on a server.

• If you got “Error creating thumbnail: terminate called after throwing an instance of 'DJVU::GException' ppmtojpeg: EOF / read error reading magic number” when view file, increase the $wgMaxShellMemory .
• Under $wgDjvuOutputExtension = 'jpg' you can force pictures to PNG format with a client-side script. Useful wherever you don′t control MediaWiki setup.

• Extension:Proofread Page
• Extension:PdfHandler
• Extension:PagedTiffHandler

• Creating a DjVu file

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