2014.12.23 03:11 "[Tiff] TIFF JBIG writer and scanlines", by Bob Friesenhahn
Today I encountered this:
% tiffcp -r -1 -c jbig golfer-150-bilevel.tiff golfer-150-bilevel-jbig.tiff golfer-150-bilevel-jbig.tiff: ISO JBIG scanline encoding is not implemented.
golfer-150-bilevel-jbig.tiff: Error, can't write scanline 0.
This was due to a GraphicsMagick user reporting that scanline reading sometimes fails due to libtiff's JBIG support reporting that reading via scanlines is not supported. I used the tiffcp incantation he provided and encountered the same error as when GraphicsMagick tries to write via its scanline writer.
This is using jbigkit-2.0. I tried on a machine with jbigkit-1.6 and it worked.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/