ePubPack, a quickie ePub zip utility for Windows (GPL)

[Freeshadow]

Originally Posted by najgori

AdvanceCOMP ZIP Compression Utility supports recompression with zopfli algorithm with any number of iterations. I am not an expert to say how well it works. However, epubs are smaller after recompression.

An epubs 1st entry has to be a uncompressed stored mimetype file. Hence manual creation is a 2-step process:
1: create a zip with the mimetype file stored uncompressed
2: add the rest of the epub files to it.

As neither Advzip nor the Zopfli executable is capable of adding files to an existing zipfile both cannot be used for epub building.

(which is the reason I posted what I posted )

YES We could need a zopfli compressor for epubs; the size difference is big enough to matter.

[Toxaris]

I don't think a zip library with zopfli support will become available to .Net very soon. The speed impact will not really warm up developers for it.

[Freeshadow]

Yes I actually hope someone at least makes a simple console version in C by replacing the existing packing routine with zopf. I think it's obvious that such a tool would be meant to optimise-packing a final version of a book.

[najgori]

advzip -z -4 -i 1000 Melville.epub
     4614268     4404517  95% Melville.epub
     4614268     4404517  95%

"Melville" is Melville - Works v.2.0.epub from this forum.
advzip is part of advancecomp 1.18.

edit: it's a very slow process on my old e8500 cpu

[Freeshadow]

<- (me) is a moron

najgori:
I have to apologise as it seems.
I overlooked that -4 option doesn't reshrink stored files
have redone a test and mimetype indeed remains STORED after recompression via -z parameter Hence as a matter of fac we CAN use advzip v. 1.17+ as an epub recompressor

a bucketload of karma comes along

[najgori]

@freeshadow
it was just a my lucky guess...

anyway, advancecomp is open source, so for someone with knowledge of c, perhaps it would not be so hard to add -epub switch with optimal parameters for epub recompression.

[Amba]

Hi. I just downloaded ePubPack onto my Windows 8 computer because I thought it would help me create my ePub files.

It downloaded just fine and opens fine, too, but for some reason it won't select my mimetype file even when I specifically click on it. It's weird because I'm pretty sure I made the mimetype file correctly, so I'm not sure why it doesn't want to work.

Any and all help would be greatly appreciated. And if anyone needs more information, feel free to ask.

[ethan_hines]

Does anyone know if compressing the fonts or the images will affect the reading of the EPUB?

[JSWolf]

Originally Posted by ethan_hines

Does anyone know if compressing the fonts or the images will affect the reading of the EPUB?

It will not effect the reading of the ePub.