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Old 12-17-2007, 11:41 PM   #1
dwbryant2000
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ebook files on reader

I noticed today when loading files on the Gen3 that the reader caused other files to be created. Does this mean you can remove some of them and how does this affect the memory requirements for storing ebooks. With only 64 mb available without a SD card (mine does not work) it makes a difference how many stories you have available for reading.

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Old 12-18-2007, 03:21 AM   #2
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Two files are created when you load a book. One is the "thumbnail image" which appears in the library; the other (the ".mpb" file) stores your current position in the book, bookmarks, etc. Both are very small and have no real impact on storage. You can delete them when you delete the book, but if the book is there and you delete them, they just get re-created.
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Old 12-18-2007, 06:36 PM   #3
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.t2b Files

As for the .t2b Files. Those are - as HarryT pointed out - the thumbnails files created and used by the CyBook.

If you have an eBook with no cover or the cover integrated in the eBook is not to your liking you could replace the .t2b file that belongs to the book in question with one you like better.

Because I had that need I tried to find information about the .t2b file format. Yet, I could not find anything and came to the conclusion that this must be some proprietary Bookeen format. Stubborn that I am this didn't hold me back however.

Hence I created this :
http://www.psynoptic.com/software/cy...mbcreator.html

Which you can download from here:
http://www.psynoptic.com/software/cy...umbcreator.zip

To run this little tool you need the .net 2.0 Framework installed on your computer. If any Linux or Mac User is interested, I might take the time to check if this also works with the Mono Framework and / or compile it against the mono framework if I find the time.

(Almost goes without saying: this little piece of software is free, is provided as is, and I can guarantee for nothing but that it is free of mal- or spyware)

Cheers,

ashalan
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Old 12-18-2007, 08:39 PM   #4
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Quote:
Originally Posted by ashalan View Post
As for the .t2b Files. Those are - as HarryT pointed out - the thumbnails files created and used by the CyBook.

If you have an eBook with no cover or the cover integrated in the eBook is not to your liking you could replace the .t2b file that belongs to the book in question with one you like better.

Because I had that need I tried to find information about the .t2b file format. Yet, I could not find anything and came to the conclusion that this must be some proprietary Bookeen format. Stubborn that I am this didn't hold me back however.

Hence I created this :
http://www.psynoptic.com/software/cy...mbcreator.html

Which you can download from here:
http://www.psynoptic.com/software/cy...umbcreator.zip

To run this little tool you need the .net 2.0 Framework installed on your computer. If any Linux or Mac User is interested, I might take the time to check if this also works with the Mono Framework and / or compile it against the mono framework if I find the time.

(Almost goes without saying: this little piece of software is free, is provided as is, and I can guarantee for nothing but that it is free of mal- or spyware)

Cheers,

ashalan
Rather nifty piece of software. Now I can resize without having to crank up Photoshop!!!

Derek
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Old 12-19-2007, 12:41 PM   #5
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Thanks very much, Ashalan! This is lovely.
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Old 12-19-2007, 06:01 PM   #6
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If there are no images in the book then you can create a new record and place an image there. This image will then be used as the thumnbail image. I am planning to add this functionality to a script "mobi2mobi" that i am writing (part of mobiperl). this script will also be able to edit meta information in MobiPocket books and add meta information to PalmDOC books (a lot of books for MobiPocket seems to actually be PalmDOC books) by converting them to MobiPocket books.
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Old 12-19-2007, 06:03 PM   #7
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Originally Posted by tompe View Post
If there are no images in the book then you can create a new record and place an image there. This image will then be used as the thumnbail image.
Not quite sure what you mean by 'new record' to be honest


Quote:
I am planning to add this functionality to a script "mobi2mobi" that i am writing (part of mobiperl). this script will also be able to edit meta information in MobiPocket books and add meta information to PalmDOC books (a lot of books for MobiPocket seems to actually be PalmDOC books) by converting them to MobiPocket books.
Excellent!

Last edited by ashalan; 12-19-2007 at 06:06 PM.
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Old 12-19-2007, 06:31 PM   #8
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Not quite sure what you mean by 'new record' to be honest
The PalmDOC and MobiPocket format conists of records. A lot of records containg the HTML file and then a sequence of records containing images with one image per record.
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Old 12-19-2007, 06:53 PM   #9
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The PalmDOC and MobiPocket format conists of records. A lot of records containg the HTML file and then a sequence of records containing images with one image per record.
PalmDoc does not support images at all. MobiPocket and PalmDoc have 4K blocks of data prior to compression which I assume you are calling records. But images can be up to 64K and are completely different blocks compressed differently and different sizes. The Palm format is a database format for all files, not just eBooks and the format of the various blocks is up to the using program.

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Old 12-19-2007, 07:38 PM   #10
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PalmDoc does not support images at all. MobiPocket and PalmDoc have 4K blocks of data prior to compression which I assume you are calling records. But images can be up to 64K and are completely different blocks compressed differently and different sizes. The Palm format is a database format for all files, not just eBooks and the format of the various blocks is up to the using program.
Since the books created by BD and uploaded here are PalmDOC books it can easily be seen that they support images. What I call PalmDOC is files where creator ID is REAd and the type is TEXt. For a MobiPocket file they are MOBI and BOOK.
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Old 12-20-2007, 12:58 AM   #11
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The PalmDOC and MobiPocket format conists of records. A lot of records containg the HTML file and then a sequence of records containing images with one image per record.
Ah, I see. Not that easy to add a record to a MobiPocket file with the software currently available, or?
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Old 12-20-2007, 01:11 PM   #12
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Since the books created by BD and uploaded here are PalmDOC books it can easily be seen that they support images. What I call PalmDOC is files where creator ID is REAd and the type is TEXt. For a MobiPocket file they are MOBI and BOOK.
BD is mis-applying the ID. Real TEXt files have no such ability. If you try one of those files on a reader that only supports PalmDOC files it will likely crash.

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Old 12-20-2007, 02:39 PM   #13
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BD is mis-applying the ID. Real TEXt files have no such ability. If you try one of those files on a reader that only supports PalmDOC files it will likely crash.
Wouldn't surprise me. But Eric Flint's Ring of Fire from Baen is the same so maybe they have used BD also. What should I then call these files? I need to distinguish between files where you can have meta information in the header and other files that are read by a MobiPocket reader.
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Old 12-20-2007, 02:45 PM   #14
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Wouldn't surprise me. But Eric Flint's Ring of Fire from Baen is the same so maybe they have used BD also. What should I then call these files? I need to distinguish between files where you can have meta information in the header and other files that are read by a MobiPocket reader.
Interesting question. I have a PDB wiki entry that shows all of the files and what they are called. Perhaps, for this kind of thing a new entry is appropriate specifying the source program.

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Old 12-28-2007, 03:23 PM   #15
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BD is mis-applying the ID. Real TEXt files have no such ability. If you try one of those files on a reader that only supports PalmDOC files it will likely crash.
Baen calls its .prc files MobiPocket/Palm/Kindle compatible. I think this means that a PalmDOC reader will just see the text, but MobiPocket/Kindle also sees the images (which are at the end of the file). It was naughty of MobiPocket to continue to label this extended format REAdTEXt, but perhaps they needed to do so for PalmDOC readers to work. The more recent MOBI formats are labeled BOOKMOBI and have more metadata, but they are presumably not PalmDOC compatible.
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