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I have a question, what does 2xwidth and 2xheight mean? I tried the result but don't know why it is called that. Does that mean the page was rotated and split in half, so that each page was turned into 2 page exactly?
Besides, soPDF is much much quicker than pdflrf, but I found I still need pdflrf to process scanned pdf(not just comics, I have lots of scanned pdf. I think many google public ebook available to sony users are scanned too). The most valued feature of pdflrf to me is to crop the edge automatically -- I can crop pages in acrobat, but scanned pdf can have all kinds of layout in page, you can't have good result with fixed crop box.
I found a software called instacropper which can crop edge of picture automatically, but to export scanned pdf to jpg will increase the file size significantly(the data in scanned pdf are images, but to convert to jpg must increased file size a lot) , so it is not a good idea.
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