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Old 03-15-2015, 03:59 AM   #16
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I believe iTunes sells all current music DRM-free, but leaves you with DRMed purchases you may have made previously.
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Old 03-15-2015, 10:32 PM   #17
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Once you've liberated a kepub, what do you need to do to make it readable on a standard epub reader? (Maybe I missed it, but I don't recall seeing kepub as one of the conversion options on Calibre.)
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Old 03-15-2015, 11:59 PM   #18
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It is already readable -- well, it may be an EPUB3.

It should have the file extension .kepub.epub, so, EPUB readers can read it... but the Kobo KEPUB reader doesn't see regular .epub files.
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Old 03-16-2015, 12:06 AM   #19
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Quote:
Originally Posted by odamizu View Post
Once you've liberated a kepub, what do you need to do to make it readable on a standard epub reader? (Maybe I missed it, but I don't recall seeing kepub as one of the conversion options on Calibre.)
It's generally a usable ePub as is, but using the Modify ePub plug-in in Calibre helps remove the extra "Kobo bits" by checking the "Strip Kobo DRM remnants" check box.
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Old 03-16-2015, 12:30 AM   #20
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Originally Posted by odamizu View Post
Once you've liberated a kepub, what do you need to do to make it readable on a standard epub reader? (Maybe I missed it, but I don't recall seeing kepub as one of the conversion options on Calibre.)
DRM free kepubs just need to be renamed to have the extension "epub". But, if you liberate them using the Obok plugin, it will be added to your calibre library as an epub. Then follow AnemicOak's suggestion, but it isn't absolutely necessary.
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Old 03-16-2015, 11:21 AM   #21
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It's generally a usable ePub as is, but using the Modify ePub plug-in in Calibre helps remove the extra "Kobo bits" by checking the "Strip Kobo DRM remnants" check box.
Thanks eschwartz, AnemicOak and davidfor!

The only difference between epub and kepub is the type of DRM?
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Old 03-16-2015, 04:04 PM   #22
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That, and the fact that the Kobo devices will use a different rendering engine with (artificially-restricted-to-)KEPUB-only features.
Last edited by eschwartz; 03-16-2015 at 08:00 PM. Reason: clarification
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Old 03-16-2015, 07:28 PM   #23
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Originally Posted by eschwartz View Post
That, and the fact that the Kobo devices will use a different rendering engine with KEPUB-only features.
The pedant in me has to say: Not really "kepub only features" but features implemented in only one of the two reader apps on the device. The only "feature" that I can think of that needs the changes in a kepub is the position reference used for the current reading positions and annotations.
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Old 03-16-2015, 07:59 PM   #24
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Agreed, artificially-restricted-to-KEPUB-only features then. Fixed.
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Old 03-17-2015, 12:12 PM   #25
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Agreed, artificially-restricted-to-KEPUB-only features then. Fixed.
Are you implying that Kobo has the ability to add those features to the RMSDK engine and chooses not to? Or that the ACCESS engine has the ability to read Adobe DRM epubs and provide the same features on them as it does on kepubs? As far as I know, neither is true, but I would be happy to learn otherwise.
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Old 03-17-2015, 03:25 PM   #26
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Kobo could choose to add said features to the RMSDK-rendered books.
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Old 03-17-2015, 07:07 PM   #27
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Are you implying that Kobo has the ability to add those features to the RMSDK engine and chooses not to? Or that the ACCESS engine has the ability to read Adobe DRM epubs and provide the same features on them as it does on kepubs? As far as I know, neither is true, but I would be happy to learn otherwise.
The ACCESS rendering engine used for kepubs is an epub3 renderer. The current version of RMSDK is still an epub2 renderer though some epub3 features are now supported. You will find that some kepubs which make use of epub3 features when rendered by an epub2 renderer look like crap. Other kepubs were produced by companies whose only epub3 "feature" was changing the version in the content.opf file to "3.0". OTOH, you pretty much need RMSDK to support Adobe's ADEPT DRM ecosystem -- the ACCESS renderer does not support Adobe's DRM.

IMO, Kobo would not be adding features to either renderer. ACCESS would handle changes for their renderer and it appears that they are moving to using the Readium codebase. The Adobe RMSDK used by Kobo is (I think...) supported by Datalogic. Going by Adobe's website, RMSDK 11 is moving towards supporting enough epub3 features to start calling it an epub3 renderer. One caveat is that Adobe never quite made it to full support of epub2. One suggestion about the future of RMSDK is that RMSDK will use the Readium code base with an Adobe ADEPT DRM wrapper.

I would disagree that this is an artificial distinction -- when Kobo was first looking at the Japanese market, RMSDK did not support enough language features to support Japanese typography with it's mixture of text directions, the use of three writing systems in kanji (a ideographic writing system), katakana and hiragana (two different phonetic alphabets), furigana (smaller kana glyphs beside or above (depending on text direction) a kanji glyph for pronunciation assistance), etc.
Last edited by DNSB; 03-17-2015 at 07:22 PM.
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Old 03-17-2015, 08:43 PM   #28
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Are you implying that Kobo has the ability to add those features to the RMSDK engine and chooses not to? Or that the ACCESS engine has the ability to read Adobe DRM epubs and provide the same features on them as it does on kepubs? As far as I know, neither is true, but I would be happy to learn otherwise.
Well, I'm the one who made the claim, but yes. The other David's post went into details, but a lot of what we are talking about is probably not in the renderer but in the interface application around it. As an example, the chapter graph in the in-book stats for kepubs is a graph of the word count of each chapter. The word count is calculated for a kepub the first time it is opened and the graph based on that. I think it would be possible to do this for epubs as well. The current position in the epub is available to the application and I'd be surprised if the chapter word count or an equivalent number wasn't as well. And of course, the 1.9.x firmware had an indicator showing the position and chapter positions along the bottom menu when it was displayed. That shows something similar is possible.

And there is no real reason Kobo can't open DRM-free epubs with the kepub reader. The reading position system used is the problem. I would be surprised if the ACCESS engine doesn't also support either the RMSDK or the epub3 reading position. My assumption has been that Kobo has turned this off and added their own position system as part of the justification of their own format. Or, they implemented it a long time ago and have decided to keep it.
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Old 03-18-2015, 07:50 AM   #29
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One good thing about the Kobo store is that they make it very easy to tell what sort of DRM an individual book is using. Anything marked "Download options: EPUB2 (DRM-Free)" will allow you to save the epub file on your PC and copy it to any device that uses epubs.

Lately I've been trying to see just how much DRM-free material I can find on the Kobo store (and elsewhere). There's quite a lot out there, actually. I've been recording the results in this thread:

https://www.mobileread.com/forums/sho...d.php?t=257084
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Old 03-18-2015, 01:33 PM   #30
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This site has a huge list of DRM-FRee books/sites. Many of them are going to be small publishers or individual authors/indie:

http://drmfree.calibre-ebook.com/
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