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Message #02704
Re: [Bug 798952] Re: vigra_impex bug creates 'arithmetic coded' JPEG output
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On Tue 21-Jun-2011 at 13:38 -0000, Yuv wrote:
>I just noticed that you don't have write access to enblend's repo.
>fixed it. you now have admin privileges on the enblend project as well.
Thanks, I committed the one line workaround.
status fixcommitted
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** Changed in: enblend
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/798952
Title:
vigra_impex bug creates 'arithmetic coded' JPEG output
Status in Enblend:
Fix Committed
Bug description:
vigra_impex has a bug which effectively means all JPEG output is
'arithmetic coded' (rather than huffman coded) if the version of
libjpeg supports it.
This is a problem as arithmetic coding isn't very portable, e.g. the
enblend 4.0 in fedora f15 is creating these JPEGs whenever JPEG is
selected for output.
The upstream vigra fix is these two changesets:
http://www.informatik.uni-hamburg.de/~meine/hg/vigra/rev/e54137017af7
http://www.informatik.uni-hamburg.de/~meine/hg/vigra/rev/f5e29e0bdfe0
It probably isn't worth backporting all this to enblend, a simple fix
is to just comment out src/vigra_impex/jpeg.cxx line 421.
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References