Last modified: 2014-10-31 17:31:00 UTC
Error creating thumbnail: convert: Too many IDAT's found `/tmp/localcopy_33a1fcdb2046-1.png' @ error/png.c/MagickPNGErrorHandler/1309. convert: corrupt image `/tmp/localcopy_33a1fcdb2046-1.png' @ error/png.c/ReadPNGImage/3294. convert: missing an image filename `/tmp/transform_a6e2fcd7c404-1.png' @ error/convert.c/ConvertImageCommand/3011. ---- Works on my local machine (fedora 17) with ImageMagick 6.7.5-6 2012-08-11 Q16 but not on Toolserver's nightshade with ImageMagick 6.6.0-4 2012-05-02 Q16; the original PNG also renders fine for me within Firefox. https://toolserver.org/~dispenser/temp/logs/cache_thumbs_errors.log gives 34 more examples, currently.
This depends on the libpng version used to compile imagemagick. I think we have another report about this somewhere in bugzilla.
libpng version info welcome. Pardon my stupid question, but where does the user interface on https://commons.wikimedia.org/wiki/File:1khz_dither.png provide a 180px version? Clicking on "Download" and under "Download image file:", clicking on any of the options "16px | 32px | 64px | 128px | 256px | Full resolution" always provides the same size and file URL in Firefox 16.0.1. Using https://upload.wikimedia.org/wikipedia/commons/e/e0/1khz_dither.png itself (probably not very useful), I get: $:andre\> pngcheck -vv 1khz_dither.png File: 1khz_dither.png (8834 bytes) chunk IHDR at offset 0x0000c, length 13 502 x 429 image, 24-bit RGB, interlaced chunk pHYs at offset 0x00025, length 9: 3779x3779 pixels/meter (96 dpi) chunk IDAT at offset 0x0003a, length 7696 zlib: deflated, 32K window, default compression rows per pass: 54, 54, 54, 108, 107, 215, 214 row filters (0 none, 1 sub, 2 up, 3 avg, 4 paeth): 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 (806 out of 806) chunk IDAT at offset 0x01e56, length 1048 row filters (0 none, 1 sub, 2 up, 3 avg, 4 paeth): physical_value = p0 + p1 * original_sample / (x1-x0) (806 out of 806) chunk IEND at offset 0x0227a, length 0 No errors detected in 1khz_dither.png (5 chunks, 98.6% compression).
(In reply to comment #2) > libpng version info welcome. 2:1.5.10-1.fc17 here > Pardon my stupid question, but where does the user interface on > https://commons.wikimedia.org/wiki/File:1khz_dither.png provide a 180px > version? Nowhere. :-) 180px has been the standard thumb size for many years, which is why it's used on https://de.wikipedia.org/wiki/Dithering_%28Audiotechnik%29#Anwendung (but there was no cached thumb and purging didn't help).
> https://toolserver.org/~dispenser/temp/logs/cache_thumbs_errors.log gives 34 > more examples, currently. Right now that log only shows one example for a picture uploaded in 2006, without thumbnails as the original is small already.
I'm seeing this same issue on one of my wikis at http://wikiapiary.com/wiki/File:IndianerWiki_Logo.png I'm on Ubuntu 12.04, ImageMagick libpng12-0 installed: % aptitude show libpng12-0 Package: libpng12-0 State: installed Automatically installed: no Multi-Arch: same Version: 1.2.46-3ubuntu4 % aptitude show imagemagick Package: imagemagick New: yes State: installed Automatically installed: no Version: 8:6.6.9.7-5ubuntu3.2
Just use GIMP (open, save) to create a "proper" PNG
Filed upstream: http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=26471
