Legacy ImageMagick Discussions Archive

Thank you, limiting the memory did solve that crash.

Here is an image that works fine for me:
https://www.dropbox.com/s/f1axlkr1jtdjqhx/0003.png?dl=0
convert 0003.png -compress group4 0003.tif
(with or without -monochrome) gives me a very nice dithered tiff image instead of the all-black image from ...

I agree that this worked in IM 6.9, the problem only appeared in version 7.0.2, I'm currently on 7.0.3-2
Adding -monochrome I get

convert 0002.png -monochrome -compress group4 0002.tif
convert(23133,0x7fff7507b000) malloc: *** error for object 0x7f8300000000: pointer being freed was not allocated ...

Hi, I'm getting an all-black page when I try to convert this png image to a group4 compressed tif

The image: https://www.dropbox.com/s/7qv50tgzac8hgkv/0002.png?dl=0
My command: convert 0002.png -compress group4 0002.tif

Setting a threshold helps in this case, but I'm looking for a general way to ...