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Bug 188667 - media-video/dvd-slideshow subtitles unreadable due to bad images generated by ImageMagick
Summary: media-video/dvd-slideshow subtitles unreadable due to bad images generated by...
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: High normal
Assignee: Gentoo Linux bug wranglers
URL:
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Depends on:
Blocks:
 
Reported: 2007-08-12 23:43 UTC by Aaron Binns
Modified: 2007-08-13 06:58 UTC (History)
0 users

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Runtime testing required: ---


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Description Aaron Binns 2007-08-12 23:43:55 UTC
Versions used:
  slideshow-0.7.5
  ImageMagick-6.3.4-r1

I think this bug is really in ImageMagick, but I only found it due to the use of it by dvd-slideshow.

In dvd-slideshow, if I enabled subtitle generation, the generated subtitles were rather unreadable.  It was as if the generated subtitles were only the font outlines with the inner part transparent.  When viewed against the slide, it was unreadable.

In the 'dvd-slideshow' script, when it calls ImageMagick's 'convert' to generate the subtitle graphic images, it used the ImageMagick 'miff' format.  I looked at the generated .miff image files and they were messed up, the subtitles were poorly rendered and were partially filled with the background color (black).

Changing the calls to 'convert' to emit png files instead of miff files, seemed to fix it -- at least generating reasonable sub-titles.


Reproducible: Always

Steps to Reproduce:
1.Create a slideshow with subtitles
2.Notice that in the DVD, the subtitles are difficult to read and are semi-transparent.
3.

Actual Results:  
The subtitles were unreadable.

Expected Results:  
The subtitles to be readable and not partially transparent.
Comment 1 Jakub Moc (RETIRED) gentoo-dev 2007-08-13 06:58:20 UTC
Please, try your luck upstream, don't see what we could do here.

http://sourceforge.net/tracker/?group_id=100188
http://www.imagemagick.org/discourse-server/viewforum.php?f=3