Sorry, wrong tool. DT does not support lossless processing of lossy formats, to be more exact, DT is not intended to process lossy formats, even if it is possible. DT is targeted at RAW images. I think DT re-encodes every image during export, without handling of corner cases like "JPEG crop only".
Have a look at "jpegtran" Regards, Markus Am 16.12.2012 17:34, schrieb Alexander Konovalenko: > I want to crop a JPEG photo without rotating it. So I'd like the top > left corner of the crop to be aligned at a 8x8 pixel square boundary. > This is to prevent reencoding the JPEG with displaced 8x8 squares > which would reduce picture quality. > > How do I make sure the coordinates of the crop's top left corner are > both a multiple of 8? If that's not possible, where should I submit a > feature request? > > Of course I can always export the full image and then crop it in GIMP, > but that would slow down the workflow considerably. > > I'm using Darktable 1.1.1 under Ubuntu 12.04. > > Thanks. > > -- Alexander > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > Darktable-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/darktable-users > ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
