html2epub: invalid cover image

Portnull · 06-25-2009, 06:27 AM

Hi all,

No matter what image format or color mode I use, html2epub always returns this:

File "/Applications/calibre.app/Contents/Resources/lib/python2.6/site-packages.zip/calibre/ebooks/epub/from_html.py", line 329, in create_cover_image
raise ValueError('Invalid cover image').

I believe the standalone Calibre application doesn't have this issue, but I'm planning on running html2epub server-side.

Portnull · 06-25-2009, 09:58 AM

It doesn't even work when I take a cover image from an epub file that's successfully been converted using Calibre.

kovidgoyal · 06-25-2009, 11:54 AM

On an OS X server?

Portnull · 06-25-2009, 02:08 PM

Probably on Linux/Apache.

Apart from that I'm a command line fanatic, and running html2epub instead of the full Calibre package would really improve my workflow.

kovidgoyal · 06-25-2009, 02:15 PM

You won't have that error on a linux machine and it should be resolved in calibre 0.6 on OS X as well (though I'm not sure)

bruce · 07-13-2009, 12:22 AM

I see the same error when using any2mobi to convert html to mobipocket with a coverage page. Doing the same process through the Calibre GUI works fine. Unfortunately, I'm facing a large pile of documents and books for which scripting using the command line tools are the only scalable approach!

Any estimate for when 0.6 will be out?

Also, do you have any plans for minimal support for exporting books to an iLiad? Essentially this would just mean a new option to export the book, cover page and a barebones manifest.xml file into a directory.

kovidgoyal · 07-13-2009, 01:16 AM

0.6 will be out within the next 10 days. 0.6 includes a basic driver for the Illiad (windows and linux only) that needs testing and more development.

bruce · 07-13-2009, 10:53 PM

Quote:

Originally Posted by kovidgoyal

0.6 will be out within the next 10 days. 0.6 includes a basic driver for the Illiad (windows and linux only) that needs testing and more development.

That's great news! Hopefully the iLiad support will migrate into the OSX port before long.

I discovered you had 0.6 out in beta shortly after making my previous post, installed it and once I figured out the name and arguments of the new command line tool, was able to generate a book using the cover page option without seeing the previous error.

The resulting file was readable on the iLiad though I could not see a cover page (can't remember whether the mobipocket reader on iLiad supports coverpages come to think of it). Stanza on desktop normally displays cover pages but can't open this file at all (dies with a "java.lang.ArrayIndexOutOfBoundsException 2302").

kovidgoyal · 07-13-2009, 10:56 PM

You can always see the cover page in the calibre ebook viewer

06-25-2009, 06:27 AM	#1
Portnull Member Posts: 14 Karma: 10 Join Date: May 2009 Device: Sony 505	html2epub: invalid cover image Hi all, No matter what image format or color mode I use, html2epub always returns this: File "/Applications/calibre.app/Contents/Resources/lib/python2.6/site-packages.zip/calibre/ebooks/epub/from_html.py", line 329, in create_cover_image raise ValueError('Invalid cover image'). I believe the standalone Calibre application doesn't have this issue, but I'm planning on running html2epub server-side.

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06-25-2009, 09:58 AM	#2
Portnull Member Posts: 14 Karma: 10 Join Date: May 2009 Device: Sony 505	It doesn't even work when I take a cover image from an epub file that's successfully been converted using Calibre.

06-25-2009, 11:54 AM	#3
kovidgoyal creator of calibre Posts: 43,826 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	On an OS X server?

06-25-2009, 02:08 PM	#4
Portnull Member Posts: 14 Karma: 10 Join Date: May 2009 Device: Sony 505	Probably on Linux/Apache. Apart from that I'm a command line fanatic, and running html2epub instead of the full Calibre package would really improve my workflow.

06-25-2009, 02:15 PM	#5
kovidgoyal creator of calibre Posts: 43,826 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You won't have that error on a linux machine and it should be resolved in calibre 0.6 on OS X as well (though I'm not sure)

07-13-2009, 12:22 AM	#6
bruce Software Developer Posts: 27 Karma: 10 Join Date: Mar 2007 Location: Tokyo, Japan Device: Sage, Oasis, Voyage, Paperwhite, iLiad, reb1100	I see the same error when using any2mobi to convert html to mobipocket with a coverage page. Doing the same process through the Calibre GUI works fine. Unfortunately, I'm facing a large pile of documents and books for which scripting using the command line tools are the only scalable approach! Any estimate for when 0.6 will be out? Also, do you have any plans for minimal support for exporting books to an iLiad? Essentially this would just mean a new option to export the book, cover page and a barebones manifest.xml file into a directory.

07-13-2009, 01:16 AM	#7
kovidgoyal creator of calibre Posts: 43,826 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	0.6 will be out within the next 10 days. 0.6 includes a basic driver for the Illiad (windows and linux only) that needs testing and more development.

07-13-2009, 10:56 PM	#9
kovidgoyal creator of calibre Posts: 43,826 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You can always see the cover page in the calibre ebook viewer

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