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

On Mon, Aug 06, 2018 at 12:39:54PM -0500, Bob Friesenhahn wrote:
> On Mon, 6 Aug 2018, Ruben Safir wrote:
> >
> >I thought that you were going to create an optpng that would allow me to
> >convert thwe images to a universally accepted format.
> 
> Maybe that was Cosmin Truta rather than J Decker.
> 
> This option seems to need to be set in the using application (e.g.
> ImageMagick).  Perhaps there are security consequences (e.g. denial
> of service opportunity) to setting it.
> 
> With the ability to compile from source code, it is possible for a
> technically competent person to build most libraries and
> applications from source code, even without using Gentoo.
> 


It makes it a lot harder to do that and keep the system consistant with
the OS package system, which is not a minor consideration.

If I know the library and the application, I can probably compile it... 

but I break the OS and maybe they don't compile.  The GIMP is huge.  I
haven't compiled it in decades and I certain am not pulling down the
entire gnome system to do this.

I'm not trying to make a rant, but this just underscores my original
point, which is that PNG files don't work and can not be trusted
as a universal file format because the files created can not be
guaranteed to be viewable in decades later.

I have lost a lot of goodi and irreplacable  images of my grandchildren 
because I trusted the PNG community.  There should be a waning about
this.


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