Please don't downscale or convert my images, ebook-convert !

nylnook · 02-09-2016, 06:22 AM

Hi Mobile Read community !

As mentioned before here on this forum, I'm trying to convert an CBZ file containing a serie of jpg file into an EPUB... and to be Amazon compliant... to distribute my first comic.

But... ! Amazon now recommend large HD image files (see p.53) and a 1920x1200 definition is a minimum...

for now I have 1020x1447 px images (to be upgraded if needed), and I just what them to be kept as they are.
And converting to an epub command line, I can't find a way to stop calibre down-scaling them to 531x754, and converting them to png which result in smaller images and increased kilobytes

!

here is the command line I use :

Code:

ebook-convert $joinedfilename.cbz $joinedfilename.epub --authors "$creator" --publisher "$creator" --title "$title" --isbn "$ebookIsbn" --pubdate "$pubDate" --no-default-epub-cover --dont-grayscale --dont-normalize --keep-aspect-ratio --comic-image-size "1020x1447" --disable-trim --dont-add-comic-pages-to-toc --wide

and processing I always get :

Code:

Rescaling image from 1020x1447 to 531x754 0_0.png

the option --comic-image-size "1020x1447" doesn't look to do anything...

Any idea ?
Is there another command line option ? should I use another input format ?
Thanks in advance !

kovidgoyal · 02-09-2016, 06:25 AM

--output-profile tablet

nylnook · 02-11-2016, 05:05 AM

Great kovidgoyal !!! It works, thanks a lot !

Maybe to add to the documentation.... ? it mentions the output profile, but nothing say the tablet one wil not convert pictures...

And thanks a lot for you work on Calibre

nylnook · 02-11-2016, 06:08 AM

Note for other readers : add
--output-format jpg

to keep the jpg format

02-09-2016, 06:22 AM	#1
nylnook Junior Member Posts: 9 Karma: 10 Join Date: Nov 2015 Device: none	Please don't downscale or convert my images, ebook-convert ! Hi Mobile Read community ! As mentioned before here on this forum, I'm trying to convert an CBZ file containing a serie of jpg file into an EPUB... and to be Amazon compliant... to distribute my first comic. But... ! Amazon now recommend large HD image files (see p.53) and a 1920x1200 definition is a minimum... for now I have 1020x1447 px images (to be upgraded if needed), and I just what them to be kept as they are. And converting to an epub command line, I can't find a way to stop calibre down-scaling them to 531x754, and converting them to png which result in smaller images and increased kilobytes ! here is the command line I use : Code: ebook-convert $joinedfilename.cbz $joinedfilename.epub --authors "$creator" --publisher "$creator" --title "$title" --isbn "$ebookIsbn" --pubdate "$pubDate" --no-default-epub-cover --dont-grayscale --dont-normalize --keep-aspect-ratio --comic-image-size "1020x1447" --disable-trim --dont-add-comic-pages-to-toc --wide and processing I always get : Code: Rescaling image from 1020x1447 to 531x754 0_0.png the option --comic-image-size "1020x1447" doesn't look to do anything... Any idea ? Is there another command line option ? should I use another input format ? Thanks in advance !

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02-09-2016, 06:25 AM	#2
kovidgoyal creator of calibre Posts: 45,221 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	--output-profile tablet

02-11-2016, 05:05 AM	#3
nylnook Junior Member Posts: 9 Karma: 10 Join Date: Nov 2015 Device: none	Great kovidgoyal !!! It works, thanks a lot ! Maybe to add to the documentation.... ? it mentions the output profile, but nothing say the tablet one wil not convert pictures... And thanks a lot for you work on Calibre

02-11-2016, 06:08 AM	#4
nylnook Junior Member Posts: 9 Karma: 10 Join Date: Nov 2015 Device: none	Note for other readers : add --output-format jpg to keep the jpg format

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