Cover size in eBooks

dKodiak · 09-14-2016, 08:29 AM

Sorry if not posted in correct forum.

I like my Covers to keep the same aspect ratio whatever device I read them on.

So I usually go in and change the svg from preserveAspectRatio="none" to preserveAspectRatio="xMid yMid meet".

This centers the cover, as well as automatically resize it to fit the screen while preserving the aspect ratio. I would like to know if there is an easy way to do this when I replace or add a new cover to the file without having to edit every single file?

Like an option in "polish ebook" and add/replace cover.

I have a quite a few ebooks, and it is very time consuming to have to edit each book.

Thank you,

Daniel

jackie_w · 09-14-2016, 08:40 AM

Quote:

Originally Posted by dKodiak

Like an option in "polish ebook" and add/replace cover.

I'm a little confused by your question because if you already know about calibre's Polish ebook option then surely you will also have seen the checkbox for 'Update the cover in the book files'. Did something go wrong when you tried this?

dKodiak · 09-14-2016, 08:46 AM

The svg code puts in preserveAspectRatio="none" in Polish ebook. which does not preserve the aspect ratio. The cover fills the screen. I use preserveAspectRatio="xMid yMid meet" which centers and keeps the aspect ratio. So I have to go in and edit each book after I polish it.

jackie_w · 09-14-2016, 08:52 AM

Quote:

Originally Posted by dKodiak

The svg code puts in preserveAspectRatio="none" in Polish ebook. which does not preserve the aspect ratio. The cover fills the screen. I use preserveAspectRatio="xMid yMid meet" which centers and keeps the aspect ratio. So I have to go in and edit each book after I polish it.

Ah, OK, it sounds like you need to revisit calibre Preferences:

Prefs - Change calibre behaviour - Conversion:Output Options - EPUB Output

then check the box labeled 'Preserve cover aspect ratio' followed by the 'Apply' button. You may need to restart calibre afterwards.

Then try Polish again.

dKodiak · 09-14-2016, 08:55 AM

Here are screenshots of what I am talking about.

In the first png, on the left is preserveAspectRatio="none" and on the right is preserveAspectRatio="xMid yMid meet".

The second screenshot is the coding

jackie_w · 09-14-2016, 09:00 AM

Yes, I know what you're talking about. Changing your calibre Prefs as per my previous post above then re-running Polish should fix that.

dKodiak · 09-14-2016, 09:03 AM

It worked, thank you. I knew there was a way....Just could not find it.

It has been a couple of years between when I last set up caliber and this time, I thought I had it before and probably did.

09-14-2016, 08:29 AM	#1
dKodiak Member Posts: 20 Karma: 10 Join Date: Sep 2013 Device: Galaxy S4	Cover size in eBooks Sorry if not posted in correct forum. I like my Covers to keep the same aspect ratio whatever device I read them on. So I usually go in and change the svg from preserveAspectRatio="none" to preserveAspectRatio="xMid yMid meet". This centers the cover, as well as automatically resize it to fit the screen while preserving the aspect ratio. I would like to know if there is an easy way to do this when I replace or add a new cover to the file without having to edit every single file? Like an option in "polish ebook" and add/replace cover. I have a quite a few ebooks, and it is very time consuming to have to edit each book. Thank you, Daniel

09-14-2016, 08:55 AM	#5
dKodiak Member Posts: 20 Karma: 10 Join Date: Sep 2013 Device: Galaxy S4	Here are screenshots of what I am talking about. In the first png, on the left is preserveAspectRatio="none" and on the right is preserveAspectRatio="xMid yMid meet". The second screenshot is the coding Attached Thumbnails

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09-14-2016, 08:46 AM	#3
dKodiak Member Posts: 20 Karma: 10 Join Date: Sep 2013 Device: Galaxy S4	The svg code puts in preserveAspectRatio="none" in Polish ebook. which does not preserve the aspect ratio. The cover fills the screen. I use preserveAspectRatio="xMid yMid meet" which centers and keeps the aspect ratio. So I have to go in and edit each book after I polish it.

09-14-2016, 09:00 AM	#6
jackie_w Grand Sorcerer Posts: 6,212 Karma: 16534894 Join Date: Sep 2009 Location: UK Device: Kobo: KA1, ClaraHD, Forma, Libra2, Clara2E. PocketBook: TouchHD3	Yes, I know what you're talking about. Changing your calibre Prefs as per my previous post above then re-running Polish should fix that.

09-14-2016, 09:03 AM	#7
dKodiak Member Posts: 20 Karma: 10 Join Date: Sep 2013 Device: Galaxy S4	It worked, thank you. I knew there was a way....Just could not find it. It has been a couple of years between when I last set up caliber and this time, I thought I had it before and probably did.

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