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Old 01-05-2023, 10:24 PM   #1
tatagi
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any tools that subset embedded fonts for multiple epubs?
I am well aware that calibre editor and sigil with plugin can do the subset operation one by one.

But I have thousands of epub files to do this for.

Can calibre or sigil do this or are there dedicated tools for this purpose?
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Old 01-06-2023, 01:33 AM   #2
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There's a --subset-font option in the calibre-debug tool.

You would use it in a script that cycled through a directory tree. Do a search for: [OS]: batch processing, where [OS] is Windows, MacOS or Linux.

BR
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Old 01-06-2023, 06:54 AM   #3
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I am well aware that calibre editor and sigil with plugin can do the subset operation one by one.

But I have thousands of epub files to do this for.

Can calibre or sigil do this or are there dedicated tools for this purpose?
You can use the Calibre GUI to subset fonts. You select the ePub you want and then right click and select Polish books. From there you can select to subset fonts and Calibre will subset all the selected ePub. Quite simple really.
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Old 01-06-2023, 02:16 PM   #4
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I’m pretty sure the OP is aware of both Calibre’s and Sigil’s one off functionality… the OP stated as much in their opening sentence… lolz
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Old 01-06-2023, 02:48 PM   #5
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I’m pretty sure the OP is aware of both Calibre’s and Sigil’s one off functionality… the OP stated as much in their opening sentence… lolz
The OP is aware it can be done in Calibre via the editor but only one at a time.

The OP is asking if there is a way to subset fonts in bulk using Calibre or Sigil and I posted the solution for Calibre.
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Old 01-06-2023, 02:58 PM   #6
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Oh - I didn’t realize polish books did multiple books at a time…
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Old 01-06-2023, 03:15 PM   #7
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Oh - I didn’t realize polish books did multiple books at a time…
It's good when we learn something new.
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Old 01-06-2023, 03:30 PM   #8
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Yup! I’m going to have to play around with that some more… thanks!
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Old 01-06-2023, 04:54 PM   #9
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The downside of using calibre GUI in this instance is that the OP would have to add "thousands of epub files" to a library, and after running Polish Books extract the same quanta of epubs from it, then remove books from the library, and finally empty the garbage.

@Turtle91 - many (most ?) of the calibre tools can be applied to multiple books.

BR
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Old 01-06-2023, 06:34 PM   #10
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The downside of using calibre GUI in this instance is that the OP would have to add "thousands of epub files" to a library, and after running Polish Books extract the same quanta of epubs from it, then remove books from the library, and finally empty the garbage.
What garbage? And why would it be a problem to add eBook to a Calibre library? And why would the eBooks have to be removed from the library?
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