Converting cbr's and cbz's to pdf's

[klikklak]

Hi all,

I've just tried converting comics to pdf and I get an

ERROR: Conversion Error: <p>Could not convert: Convert book 1 of 1 (The Metabarons 07)<p>It is a <a href="http://bugs.calibre-ebook.com/wiki/DRM">DRM</a>ed book. You must first remove the DRM using third party tools.

This is clearly an bug as cbr's have no DRM as far as I know. unraring it manually works with no errors. Also mobi conversions are effected. The system is archlinux, I'm using the AUR install method and all other conversions work just fine. It just chokes on comics.

EDIT: Here's more debugging information:

67% Creating PDF Output
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/ebooks/pdf/writer.py", line 130, in _render_html
self._render_book()
File "/usr/lib/calibre/calibre/ebooks/pdf/writer.py", line 105, in _render_book
self._write()
File "/usr/lib/calibre/calibre/ebooks/pdf/writer.py", line 141, in _write
outPDF = PdfFileWriter(title=self.metadata.title, author=self.metadata.author)
TypeError: __init__() got an unexpected keyword argument 'title'

[kovidgoyal]

Your PDF output error is caused by your system using an unpatched version of pypdf instead of the one distributed with calibre.

The cbr error is because you are using a version of libubrar.so not compiled with -DSILENT

[klikklak]

I just modified the PKGBUILD (using Archlinux and it's AUR recipe) to leave both cherrypy and pypdf in place from upstream. I still get the same error. However ebook-convert from cli runs without errors, but produces a 41K file with no images. There are no conflicting versions of pypdf or cherrypy installed.

EDIT: Perhaps this is more interesting to you: the reason I don't just use upstream is because the GUI hangs on all actions, fetching news or converting. In the process list it shows 'waiting' but doesn't progress from there.
EDIT2: it's not just the GUI, it's ebook-convert itself that hangs.

[kovidgoyal]

That error indicates an unpatched pyPDF. If you're getting it, you're using an unpatched pyPDF.

[klikklak]

I ran calibre-debug to find out what it was doing:

Converting file to html...
InputFormatPlugin: PDF Input running
on XXXX Unknown.pdf
pdftohtml log:

Traceback (most recent call last):
File "/usr/bin/calibre-parallel", line 19, in <module>
sys.exit(main())
File "/usr/lib/calibre/calibre/utils/ipc/worker.py", line 99, in main
result = func(*args, **kwargs)
File "/usr/lib/calibre/calibre/gui2/convert/gui_conversion.py", line 24, in gui_convert
plumber.run()
File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 787, in run
accelerators, tdir)
File "/usr/lib/calibre/calibre/customize/conversion.py", line 211, in __call__
log, accelerators)
File "/usr/lib/calibre/calibre/ebooks/pdf/input.py", line 50, in convert
pdftohtml(os.getcwd(), stream.name, options.no_images)
File "/usr/lib/calibre/calibre/ebooks/pdf/pdftohtml.py", line 76, in pdftohtml
raise DRMError()
calibre.ebooks.DRMError

It was apparently grabbing the old pdf conversion and converting it again to pdf and then spit out an drm error. Removing the old broken pdfs got rid of the DRM error, but I still get
files like this:

8,9M 26.3. 03:07 The Incal 11 - Unknown.cbr
36K 27.3. 13:42 The Incal 11 - Unknown.pdf