change preserveAspectRatio="none" to preserveAspectRatio="xMidYMid meet"

ger · Today, 07:41 AM

I try to convert epubs with svg-tag in titlepage.xhtml containing the attribute preserveAspectRatio="none" to kepub, altering it to preserveAspectRatio="xMidYMid meet". So I put the following regex in the Search & Replace part of the conversion dialog:

<svg xmlns="http://www.w3.org/2000/svg" height="100%" preserveAspectRatio="none"([^>]+)>

to be replaced by

<svg xmlns="http://www.w3.org/2000/svg" height="100%" preserveAspectRatio="xMidYMid meet"\1>

When I look at the resulting kepub it still contains preserveAspectRatio="none" in the svg-tag. What am I doing wrong?

kovidgoyal · Today, 07:44 AM

You need to set the option to preserve cover aspect ratio in Preferences->Output options->EPUB output IIRC kepub output wil inherit that.

ger · Today, 08:31 AM

Your hint worked for epub-to-epub-conversion but converting the resulting epub to kepub gets preserveAspectRatio="none".
But I think it doesn't matter. I deleted the kepub and sending the file to Kobo Libra 2 auto-converted it to kepub.epub with preserveAspectRatio="xMidYMid meet".

Thank you very much for your help.

Today, 07:41 AM	#1
ger Junior Member Posts: 3 Karma: 10 Join Date: Oct 2025 Location: Germany Device: kobo libra 2	change preserveAspectRatio="none" to preserveAspectRatio="xMidYMid meet" I try to convert epubs with svg-tag in titlepage.xhtml containing the attribute preserveAspectRatio="none" to kepub, altering it to preserveAspectRatio="xMidYMid meet". So I put the following regex in the Search & Replace part of the conversion dialog: <svg xmlns="http://www.w3.org/2000/svg" height="100%" preserveAspectRatio="none"([^>]+)> to be replaced by <svg xmlns="http://www.w3.org/2000/svg" height="100%" preserveAspectRatio="xMidYMid meet"\1> When I look at the resulting kepub it still contains preserveAspectRatio="none" in the svg-tag. What am I doing wrong?

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Today, 07:44 AM	#2
kovidgoyal creator of calibre Posts: 45,558 Karma: 28548962 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You need to set the option to preserve cover aspect ratio in Preferences->Output options->EPUB output IIRC kepub output wil inherit that.

Today, 08:31 AM	#3
ger Junior Member Posts: 3 Karma: 10 Join Date: Oct 2025 Location: Germany Device: kobo libra 2	Your hint worked for epub-to-epub-conversion but converting the resulting epub to kepub gets preserveAspectRatio="none". But I think it doesn't matter. I deleted the kepub and sending the file to Kobo Libra 2 auto-converted it to kepub.epub with preserveAspectRatio="xMidYMid meet". Thank you very much for your help.

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