2006.03.18 15:59 "[Tiff] old jpeg support", by Mikhail Kruk

2006.03.20 18:13 "Re: [Tiff] 3.8.1 and JPEG problem", by Bob Friesenhahn

I'm getting the following error when trying to process a TIFF file

whith JPEG compression:
none 29213.tif out.tif tiffcp -c

> Assertion failed: sp != 0, file
> ../../tiff-3.8.1-src/libtiff/tif_jpeg.c, line 1524

The file is available here: www.scorch2000.com/~meshko/29213.tif

Using CVS libtiff installed on March 18th, I am able to load this file without problem using development GraphicsMagick on a Sun SPARC workstation.

Note that this is a YCbCr JPEG file. GraphicsMagick uses this option:


so that libtiff requests that libjpeg convert the pixels to RGB before returning them to libtiff. This avoids the need for dealing with YCbCr and subsampling in the application.

Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/