Some questions about EPUB to PDF conversion

Paulo27 · 03-13-2017, 06:37 PM

Hello.

Recently I have been trying to convert some EPUBs to PDFs using calibre through the command line and have some questions.

Is there a way to set a base font but have it be overwritten if the EPUB has other base fonts set? I'm using --embed-font-family and it works like how I want with EPUBs which don't have any style or embed fonts but I'd like it to ignore that option if it finds styles with set fonts. The manual says it might get ignored but that doesn't seem to be the case. It does ignore it for some of the text, like if there's italics it'll use its embed font instead of the one I set, and the one I set shows italics fine in other documents without embed fonts. Without that option (--embed-font-family) all the embed fonts get rendered fine.

I'm also currently facing an issue where some images get split (they bleed into the next page). When using the UI conversion this doesn't happen. I tried using both (UI and command line) without any additional options and (I think) with the default settings on the UI and it generated different results.
Any idea what might be causing this?

And is there any options for handling images at all? Like making images ignore the set margins.

Thanks.

kovidgoyal · 03-14-2017, 01:15 AM

The font options in the PDF output section of the conversion dialog do exactly that. As for image splitting, no there is no way to control that. And if you see a differentce between GUI and command line then some conversion parameters must be different, since the conversion code used is the same.

Paulo27 · 03-14-2017, 11:26 AM

I should have paid more attention to the output section.
Also figured out why images were splitting by remembering calibre had a job log and trying out the settings the GUI converter was using. Apparently it was a rather specific combination of page size and margins (granted, I was only having this issue for a couple images out of dozens too).

Thanks for help.

03-13-2017, 06:37 PM	#1
Paulo27 Junior Member Posts: 2 Karma: 10 Join Date: Mar 2017 Device: none	Some questions about EPUB to PDF conversion Hello. Recently I have been trying to convert some EPUBs to PDFs using calibre through the command line and have some questions. Is there a way to set a base font but have it be overwritten if the EPUB has other base fonts set? I'm using --embed-font-family and it works like how I want with EPUBs which don't have any style or embed fonts but I'd like it to ignore that option if it finds styles with set fonts. The manual says it might get ignored but that doesn't seem to be the case. It does ignore it for some of the text, like if there's italics it'll use its embed font instead of the one I set, and the one I set shows italics fine in other documents without embed fonts. Without that option (--embed-font-family) all the embed fonts get rendered fine. I'm also currently facing an issue where some images get split (they bleed into the next page). When using the UI conversion this doesn't happen. I tried using both (UI and command line) without any additional options and (I think) with the default settings on the UI and it generated different results. Any idea what might be causing this? And is there any options for handling images at all? Like making images ignore the set margins. Thanks.

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03-14-2017, 01:15 AM	#2
kovidgoyal creator of calibre Posts: 45,345 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The font options in the PDF output section of the conversion dialog do exactly that. As for image splitting, no there is no way to control that. And if you see a differentce between GUI and command line then some conversion parameters must be different, since the conversion code used is the same.

03-14-2017, 11:26 AM	#3
Paulo27 Junior Member Posts: 2 Karma: 10 Join Date: Mar 2017 Device: none	I should have paid more attention to the output section. Also figured out why images were splitting by remembering calibre had a job log and trying out the settings the GUI converter was using. Apparently it was a rather specific combination of page size and margins (granted, I was only having this issue for a couple images out of dozens too). Thanks for help.

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