Re: Why is it that png files are not dependable over the long haul

On Wed, 1 Aug 2018, Ruben Safir wrote:

> When PNG was created I enthusiatically preserved the majority of my
> family pictures as PNG files and they were lost because of bugs in the
> PNG libraries that were fixed.  I wrote aps to try to fix them as the
> stock optpng etc all could not fix them.
>
> Now this month we lost a whole new set of precious images to some change
> int he PNG libraries.
>
> Images like this:
>
> http://www.mrbrklyn.com/brooklyn/images/wall_art_river_and_metropolitian_avenue_williamsburg_2006_00578.png
>
> which is completely mangles in the gimp and imagemagik but viewaable in
> firefox?!?

Looks good to me in GraphicsMagick.  Maybe there is a mismatch or 
defect in your installed libraries.

What does

   convert -list format|grep PNG

report for you?

Bob
-- 
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot