Bug 625725 - Wishlist - jpegtran utility misses some important options
Wishlist - jpegtran utility misses some important options
Product: Fedora
Classification: Fedora
Component: libjpeg-turbo (Show other bugs)
All Linux
low Severity medium
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Assigned To: Adam Tkac
Fedora Extras Quality Assurance
Depends On:
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Reported: 2010-08-20 05:44 EDT by Zdenek Kabelac
Modified: 2013-04-30 19:46 EDT (History)
2 users (show)

See Also:
Fixed In Version: libjpeg-turbo-1.1.0-2.fc15
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2011-07-11 11:16:44 EDT
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Description Zdenek Kabelac 2010-08-20 05:44:19 EDT
Description of problem:

libjpeg-turbo seems to come with different (older) version of jpegtran utility for lossless jpeg conversion.

It's missing support for these operations:

  -crop WxH+X+Y  Crop to a rectangular subarea
  -perfect       Fail if there is non-transformable edge blocks
  -scale M/N     Scale output image by fraction M/N, eg, 1/8

Support for lossless crop operation is quite important for digi cams.

I assume arithmetic coding could have some patent issues?? - thus maybe this option probably will not get to Fedora:
  -arithmetic    Use arithmetic coding

Version-Release number of selected component (if applicable):

Steps to Reproduce:
1. jpegtran -h

Additional info:

Comment 1 Adam Tkac 2011-07-11 11:16:44 EDT
The latest libjpeg-turbo (libjpeg-turbo-utils-1.1.0-2.fc15) supports all options written above. Closing.

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