On Mon, May 21, 2012 at 11:31 AM, Michael Mol <mike...@gmail.com> wrote: > > I'm seriously wondering if there might not be something broken with > the .jpeg files I'm spitting out. That laptop (saffron) is in the > middle of an overdue emerge --update --deep --newuse @world, though. > (And I saw it was complaining about 19 blockers...) It may be overdue > for a depclean and some other maintenance. I haven't tweaked things > much, as it's my last functioning Gentoo box until I get kaylee and > inara fixed.
It looks like the file uses arithmetic coding, which has legal restrictions (patents, licensing, blah), which means many jpeg implementations do not support it. That probably is why it works in some places and not in others. You should pretty much always use Huffman coding instead of Arithmetic coding if you're using the images on the internet or sharing them with others. The image quality is not affected by this choice, only the way the data is stored in the file. The file size will be slightly larger using Huffman, but in most cases only barely larger.
