cover size shrinks when converting/modifying epub

GeoffR · 02-05-2013, 10:23 PM

I am trying to replace the cover in an epub with a larger one. I downloaded a cover (1920x1400 jpg) from the publisher's website. Calibre reduced the size to 1053x1600 for display in its cover browser, which is fine. But when I updated the cover in the epub, whether by doing an epub-->epub conversion or by using the modify epub plugin, the cover actually stored in the epub gets reduced to 686x451.

I have a Kobo Glo which has screen resolution 1024x758, so I would like the cover to be about this size. How can I tell Calibre that?

davidfor · 02-05-2013, 10:34 PM

Do you have an output profile selected on the "Page Setup" page of the conversion options? If so, change it to "Tablet". That will prevent any resizing of images.

GeoffR · 02-05-2013, 11:52 PM

Thanks David, I had the output profile set to Kobo Reader, so I've changed it to Tablet. I also set the maximum_cover_size tweak to 768x1024, so hopefully now covers larger than this will be reduced but the smaller ones will be left alone.

02-05-2013, 10:23 PM	#1
GeoffR Wizard Posts: 3,821 Karma: 19162882 Join Date: Nov 2012 Location: Te Riu-a-Māui Device: Kobo Glo	cover size shrinks when converting/modifying epub I am trying to replace the cover in an epub with a larger one. I downloaded a cover (1920x1400 jpg) from the publisher's website. Calibre reduced the size to 1053x1600 for display in its cover browser, which is fine. But when I updated the cover in the epub, whether by doing an epub-->epub conversion or by using the modify epub plugin, the cover actually stored in the epub gets reduced to 686x451. I have a Kobo Glo which has screen resolution 1024x758, so I would like the cover to be about this size. How can I tell Calibre that?

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02-05-2013, 10:34 PM	#2
davidfor Grand Sorcerer Posts: 24,907 Karma: 47303748 Join Date: Jul 2011 Location: Sydney, Australia Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos	Do you have an output profile selected on the "Page Setup" page of the conversion options? If so, change it to "Tablet". That will prevent any resizing of images.

02-05-2013, 11:52 PM	#3
GeoffR Wizard Posts: 3,821 Karma: 19162882 Join Date: Nov 2012 Location: Te Riu-a-Māui Device: Kobo Glo	Thanks David, I had the output profile set to Kobo Reader, so I've changed it to Tablet. I also set the maximum_cover_size tweak to 768x1024, so hopefully now covers larger than this will be reduced but the smaller ones will be left alone.