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10-01-2010, 10:59 PM | #1 |
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Calibre changes size of cover.jpg when copy to new Libary --> see PDF attached
Hi folks,
Calibre changes the file size of all covers if copying to a empty library! Windows 7 32.bit / Calibre 0.7.21 What I did: 1) Create empty library 2) Copy Selection of books into new library 3) Checked filesize of cover.jpg in new library. and compare to old one I copied approx 1000 + books and filesize changed by +25% also noticeable sometime *.lit files are not copied. in the PDF you have it with step by step pictures and text Thanks Joe |
10-01-2010, 11:09 PM | #2 |
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10-01-2010, 11:50 PM | #3 |
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hi no it dosent change the dimensions.
im currently still investigating details but in all files the changes are present. i extracted the DIFF of the image changes and you can see them attached. if you look at the compare.jpg you will see the Quality settings changing from 75% --> 92% so it seems calibre is doing a preprocessing of the files before rewriting them. Thanks Joe Last edited by icq70610; 10-01-2010 at 11:57 PM. |
10-02-2010, 12:37 PM | #4 |
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yes all covers are processed. Why is that a problem?
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10-02-2010, 12:59 PM | #5 |
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Hi,
basically for two things. 1) why should a copy books to library anyhow do a preprocessing? I was assuming that the copy process is simple a copy and a rename of the directory according to the naming structure. BOOK TITLE (166) --> BOOK TITLE (23) 2) preprocessing the files and changing quality in jpg's especially when you have a small image increases the filesize without any further info. so I was wondering why my folder size was changing? Was the whole procedure planned? I mean if there is a good reason why the increase should be there im not against. I just dont see one :-( thanks for the quick reply. Joe |
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10-02-2010, 01:29 PM | #6 |
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It uses the same code path as adding books, which processes images to normalize them and replace transparent backgrounds with white ones.
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