Red Hat Bugzilla – Bug 625725
Wishlist - jpegtran utility misses some important options
Last modified: 2013-04-30 19:46:58 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
The latest libjpeg-turbo (libjpeg-turbo-utils-1.1.0-2.fc15) supports all options written above. Closing.