October 21st, 2008
Yes, they did it again!
Well I don’t really know exactly how come this happened: someone sais it’s because of a security uptate for Outlook, but I can assure you, I’m not using Outlook… I’m using Thunderbird.
And it’s not about the default Windows Fax Viewer, because I saved a couple of jpeg images and even some nice image editing software couldn’t figure out what that file was (I’m talking about Windows Paint, Corel Paint Shop Pro, and other stuff).
- I received an email at our office with some nice new artwork, made on a Mac with Adobe something CS3
- I saved the files
- I tried to open them in any kind of imaging software (and yes, I tried GIMP!)
- Finding that the file couldn’t be recognized I thiught it could be compressed or corrupted, so I opened it up on an hex editor and found strange header and footer data (namely i could recognize only the JPEG8BIM and Adobe Photoshop Machintosh strings
- I googled around and mate 2+2: Apple is not compatible with Windows…
The strange thing is that even a soooo standard JPG file is modified under MacOSX (found that it could be because of the Mac Finder…)
Since after around 0×80 bytes here it comes the standard JPEG header, well… why not try and trash the byted before?!?!
… And voila!
Well, it’s not very funny, cutting 128 bytes from every picture it comes from a Mac! So I made this nice command line utility for Windows users: StripMacHeader.
Please be aware that it doesn’t make a formally correct JPG file, as it doesn’t try to strip the garbage tail of the file: you will have to open the file after stripping and resave it, to have a real JPG file.