NoDecodeDelegateForThisImageFormat on cover save

[othalan]

I just installed calibre 0.7.46 on a linux system (Debian testing). Downloading the cover image for a book worked, but when I click "OK" in the metadata dialog I receive the following error:

Traceback (most recent call last):
File "site-packages/calibre/gui2/dialogs/metadata_single.py", line 950, in accept
File "site-packages/calibre/library/database2.py", line 891, in set_cover
File "site-packages/calibre/utils/magick/draw.py", line 42, in save_cover_data_to
File "site-packages/calibre/utils/magick/__init__.py", line 112, in load
Exception: NoDecodeDelegateForThisImageFormat `' @ error/blob.c/BlobToImage/349

The book:

"A Hard Day's Knight" by Simon R. Green

Am I missing a required package? Or is this a bug?

[kovidgoyal]

How did you install calibre?

[othalan]

I installed using the command-line python script provided on the downloads page for Linux. I used that (instead of the Debian package) so I could get the latest version of calibre as Debian can sometimes lag a significant ways behind.

[kovidgoyal]

Is this happening for all books or just a particular book?

[othalan]

I did some experiments, it seems to be happening for all books. Same error message, nothing in the quotes ever.

[kovidgoyal]

Then you have some kind of library conflict probably an incompatible version of libjpeg between the binary and your system

Run this command

LD_DEBUG=libs calibre-debug -c "from calibre.utils.magick.draw import identify as i; print i(I('lt.png')); print i(I('devices/nook.jpg'))" 2> log; grep png log; grep jpeg log

[othalan]

A highly useful command! I used that to update my library path and got it all working.

Thanks for the help!

[lantolin]

Hi,

I found this thread googling "NoDecodeDelegateForThisImageFormat" because I have the same problem.

Calibre: 0.7.52 installed from binary installer.
Debian: 6.0.1 (squeeze) all packages up to date

calibre server started as:

/opt/calibre/bin/calibre-server --with-library Calibre\ Library

leads to:

/opt/calibre/bin/calibre-server: error while loading shared libraries: libcalibre-launcher.so: cannot open shared object file: No such file or directory

So I tried:

LD_LIBRARY_PATH=/opt/calibre/lib /opt/calibre/bin/calibre-server --with-library Calibre\ Library/ &

With that it gets up but images are not displayed and I see this:

Traceback (most recent call last):
  File "site-packages/calibre/library/server/content.py", line 160, in get_cover
  File "site-packages/calibre/utils/magick/draw.py", line 112, in thumbnail
  File "site-packages/calibre/utils/magick/__init__.py", line 132, in load
Exception: NoDecodeDelegateForThisImageFormat `' @ error/blob.c/BlobToImage/349

This is the output of your suggested command:

LD_DEBUG=libs calibre-debug -c "from calibre.utils.magick.draw import identify as i; print i(I('lt.png')); print i(I('devices/nook.jpg'))" 2> log; grep png log; grep jpeg log
(128, 128, u'png')
(77, 120, u'jpeg')
      7589:	find library=libpng14.so.14 [0]; searching
      7589:	  trying file=/opt/calibre/lib/libpng14.so.14
      7589:	calling init: /opt/calibre/lib/libpng14.so.14
      7589:	calling init: /opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/png.so
      7589:	/opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/png.so: error: symbol lookup error: undefined symbol: png_LTX_RegisterPNGImage (fatal)
      7589:	/opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/png.so: error: symbol lookup error: undefined symbol: png_LTX_UnregisterPNGImage (fatal)
      7589:	calling fini: /opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/png.so [0]
      7589:	calling fini: /opt/calibre/lib/libpng14.so.14 [0]
      7589:	find library=libjpeg.so.8 [0]; searching
      7589:	  trying file=/opt/calibre/lib/libjpeg.so.8
      7589:	calling init: /opt/calibre/lib/libjpeg.so.8
      7589:	calling init: /opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/jpeg.so
      7589:	/opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/jpeg.so: error: symbol lookup error: undefined symbol: jpeg_LTX_RegisterJPEGImage (fatal)
      7589:	/opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/jpeg.so: error: symbol lookup error: undefined symbol: jpeg_LTX_UnregisterJPEGImage (fatal)
      7589:	calling fini: /opt/calibre/lib/ImageMagick-6.6.7/modules-Q16/coders/jpeg.so [0]
      7589:	calling fini: /opt/calibre/lib/libjpeg.so.8 [0]

But unfortunately I don't know what to do with that info.

Thanks in advance for your assistance.

/Luis

[kovidgoyal]

You run calibre-server as

/opt/calibre/calibre-server

not /opt/calibre/bin/calibre-server

[lantolin]

That solved it, silly me

Thanks for your quick response and many congrats for a fantastic piece of software.

[kiathuang]

Hi Lantolin, Kovidgoyal

How did you change the path so that calibre can download book images ok?

I have the same problem with Calibre 0.8.4 in that every book download results in an error. Even though the image the URL points to exists and is correct.

* the command I'm using to launch calibre is:
LD_LIBRARY_PATH=/opt/calibre/lib /opt/calibre//bin/calibre

* my system is Ubuntu 10.04.2 LTS (Lucid)

* I didn't change anything related to libjpeg that I know of

An example from the debug log reads:

Starting cover download for: The Robber Bride
Query: The Robber Bride [u'Margaret Atwood'] {u'isbn': u'9780770428211'}
Invalid cover from Amazon.com
Traceback (most recent call last):
File "site-packages/calibre/ebooks/metadata/sources/covers.py", line 56, in process_result
File "site-packages/calibre/utils/magick/__init__.py", line 132, in load
Exception: NoDecodeDelegateForThisImageFormat `' @ error/blob.c/BlobToImage/349


****************************** Amazon.com Covers ******************************
Request extra headers: [('User-agent', 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)')]
Failed to download valid cover
Took 0.323365926743 seconds
Downloading cover from: http://ecx.images-amazon.com/images/...%2B7E2TlL..jpg

************************************************** ******************************

[kovidgoyal]

You want

/opt/calibre/calibre

not

/opt/calibre//bin/calibre