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Convert "Complete National Geographic" CNG files to JPG for use under Linux
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README.md
cng2jpg.py

README.md

cng2jpg

Convert "Complete National Geographic" CNG files to JPG for use under Linux

Basic usage

copying from CD into local hard drive:

cng2jpg.py --src /run/media/_user_/CNG_DISC1/disc1/images --dst ~/CNG/discs/images

convert a hard drive copy

cng2jpg.py --src ~/CNG/discs [--remove]

Use --remove to get rid of .cng files as they are converted, to avoid needing extra 40+Gb of space for both jpg and cng.

References

"The cng files are all jpegs, XOR'd bitwise with 239"

http://www.subdude-site.com/WebPages_Local/RefInfo/Computer/Linux/LinuxGuidesByBlaze/appsImagePhotoTools/cng2jpgGuide/cng2jpg_guide.htm

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