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mconf / bigbluebutton

BigBlueButton is an open source web conferencing system for distance education
www.bigbluebutton.org
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Problems on pdf slide processing #199

Open mconf-daileon opened 8 years ago

mconf-daileon commented 8 years ago

Author Name: Mateus Dalepiane (Mateus Dalepiane) Original Redmine Issue: 1464, http://dev.mconf.org/redmine/issues/1464 Original Date: 2015-02-18

Some problems were detected on pdf slides processed at a room running on http://mconf-live2.ufrgs.br this afternoon.

The images attached are examples of such problems:

  1. Random squares inserted into a slide.
  2. Slides with reduced quality.
  3. Bullets changed from circles to squares
  4. The top bar color changed from black to grey.

After using ghost script, the reduced quality slides were improved. The following script was used: gs -sDEVICE=pdfwrite -dBATCH -dNOPAUSE -dSAFER -dPDFSETTINGS=/prepress -dCompatibilityLevel=1.5 -dAutoFilterColorImages=false -dColorImageFilter=/FlateEncode -dAutoFilterGrayImages=false -dGrayImageFilter=/FlateEncode -sOutputFile=mconf.pdf -f presentation.pdf

mconf-daileon commented 8 years ago

Original Redmine Comment Author Name: Mateus Dalepiane (Mateus Dalepiane) Original Date: 2015-02-18T18:51:38Z

Version of pdflatex used:

pdfTeX 3.1415926-2.4-1.40.13 (TeX Live 2012/Debian) kpathsea version 6.1.0 Copyright 2012 Peter Breitenlohner (eTeX)/Han The Thanh (pdfTeX). There is NO warranty. Redistribution of this software is covered by the terms of both the pdfTeX copyright and the Lesser GNU General Public License. For more information about these matters, see the file named COPYING and the pdfTeX source. Primary author of pdfTeX: Peter Breitenlohner (eTeX)/Han The Thanh (pdfTeX). Compiled with libpng 1.2.49; using libpng 1.2.49 Compiled with zlib 1.2.7; using zlib 1.2.7 Compiled with poppler version 0.20.5

mconf-daileon commented 8 years ago

Original Redmine Comment Author Name: Pedro Beschorner Marin (Pedro Beschorner Marin) Original Date: 2015-03-11T16:16:22Z

Tested adding freetype, jpeglib and xpdf as described here: https://code.google.com/p/bigbluebutton/issues/detail?id=1874 The bug wasn't fixed.

mconf-daileon commented 8 years ago

Original attachments: