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It's a science in itself. You have to know what can be packed and how.
There is some data that is already packed. You have to know or find out how they are prepackaged. These can then be unpacked again and can finally be compressed better with a packer.
It is important to know what you can pack with what. And which packer works and how.
Bzip and Gzip are used a lot. So these types can be "unpacked" again. And this "raw data" can then be packed better again.
Certain games then have their own formats, which have to be processed accordingly with other programs so that they can be compressed effectively.
I have been dealing with this matter for a while now and am also trying to find out what can be implemented and how.
It would be great if you could do a tutorial here on the board to show us how something can be done there.
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