Failed to embed metadata

[mihal.v]

What does mean the following error message when trying to embed metadata?

calibre, version 2.25.0
WARNING: Failed for some files: Failed to embed metadata into some book files. Click "Show details" for details.

The PDF format of Photoshop CS6: Visual QuickStart Guide:

Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 365, in set_file_type_metadata
File "site-packages\calibre\customize\builtins.py", line 502, in set_metadata
File "site-packages\calibre\ebooks\metadata\pdf.py", line 160, in set_metadata
File "site-packages\calibre\utils\podofo\__init__.py", line 41, in set_metadata
Exception: Failed to set PDF metadata: Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 274, in main
File "site-packages\calibre\utils\podofo\__init__.py", line 57, in set_metadata_
Error: ePdfError_InvalidDataType

Ebook file has all security permissions.

[kovidgoyal]

It means there is something about that PDF that causes PoDoFo to fail when trying to write updated metadata. Impossible to say what it is without access to the PDF.

[canpolat]

I also have this problem with some of the PDFs in my library.

calibre, version 2.31.0
WARNING: Failed for some files: Failed to embed metadata into some book files. Click "Show details" for details.

The PDF format of İskandinav Hikâyeleri Antolojisi:

Traceback (most recent call last):
  File "/usr/lib/calibre/calibre/customize/ui.py", line 365, in set_file_type_metadata
    plugin.set_metadata(stream, mi, ftype.lower().strip())
  File "/usr/lib/calibre/calibre/customize/builtins.py", line 502, in set_metadata
    set_metadata(stream, mi)
  File "/usr/lib/calibre/calibre/ebooks/metadata/pdf.py", line 160, in set_metadata
    return podofo_set_metadata(stream, mi)
  File "/usr/lib/calibre/calibre/utils/podofo/__init__.py", line 41, in set_metadata
    raise Exception('Failed to set PDF metadata in (%s): %s'%(mi.title, e.orig_tb))
Exception: Failed to set PDF metadata in (İskandinav Hikâyeleri Antolojisi): Traceback (most recent call last):
  File "/usr/lib/calibre/calibre/utils/ipc/simple_worker.py", line 274, in main
    res = {'result':func(*args, **kwargs)}
  File "/usr/lib/calibre/calibre/utils/podofo/__init__.py", line 57, in set_metadata_
    p.open(u'input.pdf')
Error: An internal error occurred.

Here is an example file: [Removed the file since the problem is solved.]

I have this problem in multiple files. I wonder if there is a way to fix this?

[Divingduck]

This happens because you have in your example a protected PDF file.

[canpolat]

@Divingduck: Thank you for the response. Do you know if there is a simple way to bulk-remove this sort of protection (within or outside Calibre)? I'm on Linux, by the way...

[canpolat]

I found this: http://stackoverflow.com/questions/1...files#14233759

I'll try and report back as soon as I can.

[canpolat]

In case someone else stubmles accross this thread here is the solution. I ended up using qpdf:

qpdf --decrypt myfile.pdf decrypted.pdf