.cbz conversion hangs

roguesith · 12-09-2011, 05:01 AM

I had some cbz and cbr files I wanted to batch convert to epub.

Calibre gui continuously sticks at 1% for over 24 hours (two callibre-parrallel.exe processes switch between hogging all the cpu and running disk access to max the whole time)

I get fed up and use some cygwin magic

Code:

ls | grep -v .jpg | grep -v .opf | grep -v .epub | grep -v .bat | grep -v .sh | sed s/^/\"C:\\\\Program\ Files\ \(x86\)\\\\Calibre2\\\\ebook-convert.exe\"\ \"/ | sed s/$/\"/ > convert.bat
ls | grep -v .jpg | grep -v .opf | grep -v .epub | grep -v .bat | grep -v .sh | sed s/^/\"c:\\\\temp\\\\comics\\\\epub\\\\/ | sed s/\.cbz/\.epub/ | sed s/\.cbr/\.epub/ | sed s/$/\"/ > ls.bat
paste -d" " convert.bat ls.bat > converts.bat
./converts.bat
cat converts.bat > log.sh
rm -fv *.bat

which edits every file down to a simple command like:

Code:

"C:\Program Files (x86)\Calibre2\ebook-convert.exe" "Hellsing V01 - Kohta.cbz" "c:\temp\comics\epub\Hellsing V01 - Kohta.epub"

this works fine, at ~5min /comic. It doesn't keep all the custom covers and metadata correctly (WHICH IS SITTING RIGHT THERE IN OPF FORMAT FROM THE CALIBRE SAVE) but this is easy to fix as I can open the entry in Calibre and just add the epub format to the same entry and delete the cbz/cbr format. And converting again to get the right covers and metadata in.

The only other option I would want is to specify the page layout like in the gui (particularly the fact that the tablet format says that it does not resize images). Maybe there is a cli option but I didn't see it when I glanced through the manual. Small images pretty much destroy comic text.

I would like to know why the gui hangs (and eats resources) as this would be my preferred method.

Some things worth noting
using Calibre 8.29
other conversions work fine (I mostly use mobi to epub)
ebook-convert uses c:\cygwin\tmp\ (lol)

EDIT:
playing around with the settings, --output-profile="tablet" causes it to hang like the gui.

Code:

"C:\Program Files (x86)\Calibre2\ebook-convert.exe" "Batman - Arkham Asylum - Grant Morrison.cbr" "c:\temp\comics\epub\Batman - Arkham Asylum - Grant Morrison.epub" --output-profile="tablet"
1% Converting input to HTML...
InputFormatPlugin: Comic Input running
on C:\temp\comics\cb\Batman - Arkham Asylum - Grant Morrison.cbr
*no progression here*

as opposed to

Code:

"C:\Program Files (x86)\Calibre2\ebook-convert.exe" "Batman - Arkham Asylum - Grant Morrison.cbr" "c:\temp\comics\epub\Batman - Arkham Asylum - Grant Morrison.epub"
1% Converting input to HTML...
InputFormatPlugin: Comic Input running
on C:\temp\comics\cb\Batman - Arkham Asylum - Grant Morrison.cbr
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Parsing all content...
34% Running transforms on ebook...
Merging user specified metadata...
Detecting structure...
Flattening CSS and remapping font sizes...
Source base font size is 12.00000pt
Removing fake margins...
Cleaning up manifest...
Trimming unused files from manifest...
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Generating default cover
EPUB output written to c:\temp\comics\epub\Batman - Arkham Asylum - Grant Morrison.epub
Output saved to c:\temp\comics\epub\Batman - Arkham Asylum - Grant Morrison.epub

kovidgoyal · 12-09-2011, 05:32 AM

Turn off your antivirus.

roguesith · 12-09-2011, 10:31 AM

Several hours, appears to have the same result. If it can straight up convert and resize images in seconds apiece, I do not see how it should take hours to not even touch any (as far as the cli output notifies).

I assume it has something to do with the dozen or so 976M (1e9 bytes) magick-* files it uses so much disk access for instead of the extracted archives folders like the lower quality version. But just a guess.

kovidgoyal · 12-09-2011, 01:25 PM

Since the GUI uses *exactly the same code* as ebook-convert, I think not. Look at the job log in the GUI to see where it is waiting.

roguesith · 12-10-2011, 04:11 AM

Nono, sorry if I'm being confusing. There is no difference between the gui and cli, the difference is the --output-profile="tablet" option. Without that option, it takes 5 minutes to render. With that option on it pushes a lot of disk usage to magick-* files in appdata or tmp.

I guess all I'm saying is it's very slow and resource intensive. Is there a better way (or profile) to get my 200 cbz/cbr books to epub without mobile phone sized images and without waiting ~2 days per book?

kovidgoyal · 12-10-2011, 04:14 AM

The larger the images you are processing, the more time they will take. Simply set an image size that is appropriate for whatever use case you want in the Comic input section of the conversion settings for that book.

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12-09-2011, 05:32 AM	#2
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Turn off your antivirus.

12-09-2011, 10:31 AM	#3
roguesith Junior Member Posts: 3 Karma: 10 Join Date: Dec 2011 Device: Kindle Fire (prospective)	Several hours, appears to have the same result. If it can straight up convert and resize images in seconds apiece, I do not see how it should take hours to not even touch any (as far as the cli output notifies). I assume it has something to do with the dozen or so 976M (1e9 bytes) magick-* files it uses so much disk access for instead of the extracted archives folders like the lower quality version. But just a guess.

12-09-2011, 01:25 PM	#4
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Since the GUI uses exactly the same code as ebook-convert, I think not. Look at the job log in the GUI to see where it is waiting.

12-10-2011, 04:11 AM	#5
roguesith Junior Member Posts: 3 Karma: 10 Join Date: Dec 2011 Device: Kindle Fire (prospective)	Nono, sorry if I'm being confusing. There is no difference between the gui and cli, the difference is the --output-profile="tablet" option. Without that option, it takes 5 minutes to render. With that option on it pushes a lot of disk usage to magick-* files in appdata or tmp. I guess all I'm saying is it's very slow and resource intensive. Is there a better way (or profile) to get my 200 cbz/cbr books to epub without mobile phone sized images and without waiting ~2 days per book?

12-10-2011, 04:14 AM	#6
kovidgoyal creator of calibre Posts: 44,566 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The larger the images you are processing, the more time they will take. Simply set an image size that is appropriate for whatever use case you want in the Comic input section of the conversion settings for that book.

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