[Nottingham] Tweaking the orientation flag in a jpeg

Graham Dicker graham.dicker at antecor.com
Wed Sep 1 11:44:54 UTC 2010

Hi everyone

Does anyone know of a utility that can modify just one byte at a given offset 
in a file? I want to change the orientation flag in a set of jpegs for which 
lossless rotate is not an option. The flag is at the same offset in every file 
and just needs to be changed from a 1 to a 6.



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