[wp-trac] Re: [WordPress Trac] #7039: Thumbnails won't create with 8bpp JPEG

WordPress Trac wp-trac at lists.automattic.com
Fri Jul 11 12:36:44 GMT 2008

#7039: Thumbnails won't create with 8bpp JPEG
 Reporter:  cannonball_              |        Owner:  anonymous
     Type:  defect                   |       Status:  reopened 
 Priority:  normal                   |    Milestone:  2.6      
Component:  General                  |      Version:  2.5.1    
 Severity:  normal                   |   Resolution:           
 Keywords:  has-patch needs-testing  |  
Changes (by arminbw):

  * priority:  low => normal


 Replying to [comment:4 DD32]:
 > Some older software has issues with mono jpegs & cmyk jpegs, and would
 > produce a blank image. In this case though, Its not an interesting.

 CMYK jpeg images show up in modern browsers without any indication.
 However, after uploading no thumbnails are generated by WP.
 No error message informs the user about that.

 Afterwards functions like "wp_get_attachment_thumb_url" will return the
 full-size image giving no hints about the source of all these the
 troubles. (There can be other sources:

 A "no thumbnail available" image instead of the full-size image would be
 A "CMYK not supported. No thumbnails have been created" message after the
 upload would be helpful.
 Actual, converting the image to RGB before/while creating the thumbnail
 would be great.

Ticket URL: <http://trac.wordpress.org/ticket/7039#comment:6>
WordPress Trac <http://trac.wordpress.org/>
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