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Old 11-22-2017, 01:20 PM   #1
aleksei_iv
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Convert EPUB 2.0 to 3.0 and vice versa
Is it possible to convert EPUB 2.0 to 3.0 and 3.0 to 2.0 using Calibre?

Cheers
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Old 11-22-2017, 01:22 PM   #2
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3->2 yes
2->3 no
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Old 11-23-2017, 03:22 PM   #3
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Hm. Okay. Ta!
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Old 11-23-2017, 03:37 PM   #4
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Hm. Okay. Ta!
For 2->3 see [Plugin] ePub3-itizer - epub3 output plugin for Sigil

BR
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Old 11-28-2017, 04:27 AM   #5
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Why would there be a need to convert an ePub 2 book to ePub 3? All ePub 3 readers can read ePub 2, and conversion would add nothing in the way of new functionality.
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Old 11-28-2017, 10:10 AM   #6
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Why would there be a need to convert an ePub 2 book to ePub 3? All ePub 3 readers can read ePub 2, and conversion would add nothing in the way of new functionality.
I think there is this perception that converting to EPUB3 gains features.

This would be like converting a 78rpm shellac to DTS encoded disc and expecting Concert Hall, surround sound (without clicks and hisses )
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Old 11-28-2017, 10:53 AM   #7
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I think there is this perception that converting to EPUB3 gains features.

This would be like converting a 78rpm shellac to DTS encoded disc and expecting Concert Hall, surround sound (without clicks and hisses )
Exactly. Unless you plan to edit the book and add ePub3-specific functionality, it's a completely pointless endeavour.
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Old 11-28-2017, 01:55 PM   #8
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Maybe this helps at least to better guess:
http://www.idpf.org/epub/30/spec/epub30-changes.html

I needed it for MATHML basically.
Thanks for the plugin, BetterRed. I'll try it soon.
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