Epub to pdf conversion page sizes wrong

Mr Wolf · 07-10-2023, 03:09 PM

Hi all, I've just migrated my Calibre configuration (options and books) from an old Windows 7 with Calibre 4 computer to a Windows 10 with Calibre 6 computer.

I tried to convert several epubs to pdfs and chosen as page size A4 (210 x 297 mm), but the output is always 215.9 x 279.4 mm for any book and I can't undersand why.

Am I missing something or could it be a bug?

Comfy.n · 07-10-2023, 03:35 PM

Quote:

Originally Posted by Mr Wolf

Hi all, I've just migrated my Calibre configuration (options and books) from an old Windows 7 with Calibre 4 computer to a Windows 10 with Calibre 6 computer.

I tried to convert several epubs to pdfs and chosen as page size A4 (210 x 297 mm), but the output is always 215.9 x 279.4 mm for any book and I can't undersand why.

Am I missing something or could it be a bug?

Are you sure you're not choosing Letter size?

Mr Wolf · 07-10-2023, 04:22 PM

Hi, no, A4.
Could it be a problem due to migration? I noticed that some settings were not kept in the new computer.
I'll try with a fresh installation.

Comfy.n · 07-10-2023, 04:25 PM

this looks unusual, indeed.

another thing you may have already checked out is if the "Custom Size" field is blank, in PDF output

kovidgoyal · 07-10-2023, 08:54 PM

see https://www.mobileread.com/forums/sh...d.php?t=186697

Mr Wolf · 07-11-2023, 03:41 AM

Ok, I think something went wrong with migration, because with a fresh installation the problem doesn't happen.

However, I've discovered another odd thing: the problem happens only with new books added.
If I convert from epub to pdf a book I've already add in my library, it is correctly converted with the right format A4.
If I add a new epub and convert it to pdf, the page sizes are unexplainably forced to 215.9 x 279.4 mm.

kovidgoyal · 07-11-2023, 04:40 AM

That will be because for existing books previous conversion settings are used. for new books the defaults you have set in Preferences->Conversion will be used. You have got that paper size set there.

Mr Wolf · 07-11-2023, 04:37 PM

Ok, I've checked that in my library, in the file metadata.db, there are the conversion settings of each book.

I think I've solved the problem replacing with the Calibre folder configuration from a fresh installation the folder configuration after migration. This to avoid to have to manually re-import all my books after a fresh installation.
I'll check better if this really worked.

By the way, in what file are the settings stored? In special way, the setting about page size in conversion? There are may files in that folder.

Thanks for your support, btw.

BetterRed · 07-11-2023, 06:41 PM

Quote:

Originally Posted by Mr Wolf

. . .
By the way, in what file are the settings stored? In special way, the setting about page size in conversion? There are may files in that folder.

Book specific conversion settings are stored in the library database.

BR

Comfy.n · 07-11-2023, 06:54 PM

Today I found this file in %userprofile%\AppData\Roaming\calibre\conversion, named pdf_output.py.

It holds the default settings for Calibre conversion to PDF, and I noticed that any changes applied to it take effect instantly, for books that don't have specific settings stored in the library database.

Mr Wolf · 07-12-2023, 09:38 AM

I checked that file, and, after migration, "paper_size" is set to "a4", but it gives me that problem.
However, the solution I tried (replacing configuration folder after migration with configuration folder from a fresh installation) seems to work.

07-10-2023, 03:09 PM	#1
Mr Wolf Junior Member Posts: 6 Karma: 10 Join Date: Jan 2016 Device: Calibre	Epub to pdf conversion page sizes wrong Hi all, I've just migrated my Calibre configuration (options and books) from an old Windows 7 with Calibre 4 computer to a Windows 10 with Calibre 6 computer. I tried to convert several epubs to pdfs and chosen as page size A4 (210 x 297 mm), but the output is always 215.9 x 279.4 mm for any book and I can't undersand why. Am I missing something or could it be a bug?

07-11-2023, 03:41 AM	#6
Mr Wolf Junior Member Posts: 6 Karma: 10 Join Date: Jan 2016 Device: Calibre	Ok, I think something went wrong with migration, because with a fresh installation the problem doesn't happen. However, I've discovered another odd thing: the problem happens only with new books added. If I convert from epub to pdf a book I've already add in my library, it is correctly converted with the right format A4. If I add a new epub and convert it to pdf, the page sizes are unexplainably forced to 215.9 x 279.4 mm. Last edited by Mr Wolf; 07-11-2023 at 03:44 AM.

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07-10-2023, 04:22 PM	#3
Mr Wolf Junior Member Posts: 6 Karma: 10 Join Date: Jan 2016 Device: Calibre	Hi, no, A4. Could it be a problem due to migration? I noticed that some settings were not kept in the new computer. I'll try with a fresh installation.

07-10-2023, 04:25 PM	#4
Comfy.n want to learn what I want Posts: 1,611 Karma: 7891011 Join Date: Sep 2020 Device: none	this looks unusual, indeed. another thing you may have already checked out is if the "Custom Size" field is blank, in PDF output

07-10-2023, 08:54 PM	#5
kovidgoyal creator of calibre Posts: 45,343 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	see https://www.mobileread.com/forums/sh...d.php?t=186697

07-11-2023, 04:40 AM	#7
kovidgoyal creator of calibre Posts: 45,343 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That will be because for existing books previous conversion settings are used. for new books the defaults you have set in Preferences->Conversion will be used. You have got that paper size set there.

07-11-2023, 04:37 PM	#8
Mr Wolf Junior Member Posts: 6 Karma: 10 Join Date: Jan 2016 Device: Calibre	Ok, I've checked that in my library, in the file metadata.db, there are the conversion settings of each book. I think I've solved the problem replacing with the Calibre folder configuration from a fresh installation the folder configuration after migration. This to avoid to have to manually re-import all my books after a fresh installation. I'll check better if this really worked. By the way, in what file are the settings stored? In special way, the setting about page size in conversion? There are may files in that folder. Thanks for your support, btw.

07-11-2023, 06:54 PM	#10
Comfy.n want to learn what I want Posts: 1,611 Karma: 7891011 Join Date: Sep 2020 Device: none	Today I found this file in %userprofile%\AppData\Roaming\calibre\conversion, named pdf_output.py. It holds the default settings for Calibre conversion to PDF, and I noticed that any changes applied to it take effect instantly, for books that don't have specific settings stored in the library database.

07-12-2023, 09:38 AM	#11
Mr Wolf Junior Member Posts: 6 Karma: 10 Join Date: Jan 2016 Device: Calibre	I checked that file, and, after migration, "paper_size" is set to "a4", but it gives me that problem. However, the solution I tried (replacing configuration folder after migration with configuration folder from a fresh installation) seems to work.

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