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Old 12-31-2019, 08:04 AM   #1
Emanuele42
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Wink Error when using ebook-convert: "invalid start byte"

I get this error when I attempt any conversion using ebook-convert.
I have the DeDRM and obok plugins installed.
My platform is linux.
This is the complete failure log:
Code:
$ ebook-convert /path/Patrick_van_Veen.tmp.epub /path2/Patrick_van_Veen.epub
1% Converting input to HTML...
InputFormatPlugin: EPUB Input running
on /path/Patrick_van_Veen.tmp.epub
Found HTML cover OEBPS/Text/00_Cover.xhtml
Traceback (most recent call last):
  File "/home/phablet/.local/share/sturmreader.emanuelesorce/calibre/ebook-convert", line 20, in <module>
    sys.exit(main())
  File "/home/phablet/.local/share/sturmreader.emanuelesorce/calibre/PYTHON/lib/calibre/calibre/ebooks/conversion/cli.py", line 380, in main
    plumber.run()
  File "/home/phablet/.local/share/sturmreader.emanuelesorce/calibre/PYTHON/lib/calibre/calibre/ebooks/conversion/plumber.py", line 1057, in run
    accelerators, tdir)
  File "/home/phablet/.local/share/sturmreader.emanuelesorce/calibre/PYTHON/lib/calibre/calibre/customize/conversion.py", line 241, in call
    log, accelerators)
  File "/home/phablet/.local/share/sturmreader.emanuelesorce/calibre/PYTHON/lib/calibre/calibre/ebooks/conversion/plugins/epub_input.py", line 256, in convert
    nopf.write(opf.render())
  File "/home/phablet/.local/share/sturmreader.emanuelesorce/calibre/PYTHON/lib/calibre/calibre/ebooks/metadata/opf2.py", line 1271, in render
    raw = etree.tostring(self.root, encoding='ascii', pretty_print=True)
  File "src/lxml/lxml.etree.pyx", line 3326, in lxml.etree.tostring (src/lxml/lxml.etree.c:84227)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte
-> exit code: 1
thanks!!
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Old 12-31-2019, 10:25 AM   #2
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You appear to have either built calibre from source or using some non-standard package of it. use the official binaries and you will be fine.
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Old 01-01-2020, 06:22 AM   #3
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Yes. In fact what I am I doing is packaging Calibre for Ubuntu Touch. Maybe it's difficult, but could you give some suggestion on what causes the problem or what to do to solve it?
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Old 01-01-2020, 07:09 AM   #4
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the tracebacks does not match line numbers in current calibre source, can you generate one with current source?
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Old 01-02-2020, 10:18 AM   #5
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For this I prefer to use the Calibre version that is in the distro repository, that is 2.55.0.
But if that's a problem, I can build from current source
Interesting detail I missed in the first post is that in the container I use to build Calibre doesn't raise that error, but in the target environment it fails.
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Old 01-02-2020, 10:19 AM   #6
kovidgoyal
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2.55 is ancient no way anyone is going to be able to help with that.
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Old 01-02-2020, 02:20 PM   #7
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Ok I will try with latest master and report back. Thanks
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Old 01-08-2020, 03:04 PM   #8
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I am having some issues building calibre, I am not sure I am starting from the right place since I have not found any clue or guide or documentation about building it. But I am sure it's me missing it, where can I find something helpful with that?
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Old 01-08-2020, 09:38 PM   #9
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There is no guide as such, scripts to build all calibre dependencies are here: https://github.com/kovidgoyal/bypy
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Old 01-10-2020, 02:12 PM   #10
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I see. But I have issues handling the Calibre buiding and in general handling the use of Calibre in my project. But I understand it's me doing not standard things so it's ok that you can't just tell me what to do.
I really care about this project I am working on, so if someone wants to assist me step by step solving this issue guiding me I will be happy to pay him for the support
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