Last modified: 2014-04-15 06:22:17 UTC

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Bug 41385 - Ignorable TIFF warnings prevent thumbnail generation
Ignorable TIFF warnings prevent thumbnail generation
Status: NEW
Product: MediaWiki
Classification: Unclassified
File management (Other open bugs)
unspecified
All All
: Low normal (vote)
: ---
Assigned To: Nobody - You can work on this!
https://commons.wikimedia.org/wiki/Fi...
:
Depends on:
Blocks: 41371
  Show dependency tree / graph
 
Reported: 2012-10-25 10:49 UTC by Nemo
Modified: 2014-04-15 06:22 UTC (History)
5 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---

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Description Nemo 2012-10-25 10:49:26 UTC 
In the example file, metadata extraction with identify fails, cf. "IWH_Blau.tif ‎(0 × 0 pixels, file size: 21, MIME type: image/tiff, 0 pages)", and thumbs are not generated.
Another example with paged TIFF: https://commons.wikimedia.org/wiki/File:Broglie_-_Souvenirs,_1830-1832.tif

thedj[work]> Nemo_bis: that might be a bug. we use identify to get some metadata about the file i believe and it seems that the warnings make it fail. It should ignore the warnings though.
Comment 1 Marco 2012-10-26 11:56:33 UTC 
The file size of the IWH_Blau.tif was quite large. I compressed it with the DEFLATE algorithm. (Thumbnails now work)
Comment 2 Bryan Tong Minh 2012-10-27 11:30:25 UTC 
I'm not sure if there is a way around this, as we use identify to determine the image dimensions, and without those we cannot thumbnail them.
Comment 3 Derk-Jan Hartman 2012-10-27 12:23:19 UTC 
We have wgTiffIdentifyBypassMessages, which can be used to ignore specific issues that are harmless.

However... i just reverted this record to a previous version and now suddenly that 'historic' version works. This indicates there might be something wrong with the purging of tiff metadata....
Comment 4 Nemo 2012-10-27 12:39:03 UTC 
(In reply to comment #3)
> However... i just reverted this record to a previous version and now suddenly
> that 'historic' version works. This indicates there might be something wrong
> with the purging of tiff metadata....

And the same for the other TIFF in comment 0, which was probably affected by 41362.
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