On Wed, 2009-05-27 at 21:30 +0200, Bill Allombert wrote: > On Wed, May 27, 2009 at 02:10:00PM -0500, Richard Laager wrote: > > Hello Richard, > > > From the man page: > > NAME > > jpegtran - lossless transformation of JPEG files > > ... > > ... But by the same token, jpegtran cannot perform lossy > > operations > > such as changing the image quality. > > Only when applied to JPEG files, not EXIF files with are not valid JPEG > files according to the JFIF standard. (It is not possible for a file to > be both EXIF and JFIF compliant). If you want to manipulate EXIF files, > use exif software.
Issues with jpegtran aside, is using jpegexiforient to set the EXIF orientation flag the right solution, assuming my viewers all support EXIF? (That doesn't help with programs that don't read EXIF tags, of course.) Richard
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