https://sourceforge.net/p/sng/bugs/4/2016-01-10T11:57:44.118000ZRecent changes to 4: SNG has problems with control chars in zTXt2016-01-10T11:57:44.118000Z2016-01-10T11:57:44.118000ZMax Hornhttps://sourceforge.net/u/fingolfin/https://sourceforge.net1e543e931bb05890fd16eb063e99558e1e5da5ca

<div class="markdown_content"><p>Also note that the PNG ISO spec says the following on the content of tEXt and zTXt chunks (see <a href="http://www.libpng.org/pub/png/spec/iso/index-object.html#11tEXt" rel="nofollow">http://www.libpng.org/pub/png/spec/iso/index-object.html#11tEXt</a>): "Characters other than those defined in Latin-1 plus the linefeed character have no defined meaning in tEXt chunks." -- in particular, control characters have undefined meaning.</p> <p>That said, I still think they should survive a sng roundtrip; I merely wanted to point out that by including them in the first place, you may already be making a mistake...</p></div>

2013-08-08T16:58:01.292000Z2013-08-08T16:58:01.292000ZMax Hornhttps://sourceforge.net/u/fingolfin/https://sourceforge.nete2f1c8158c638759ae2a171f047b8567a007a7c7

<div class="markdown_content"><p>Hm, that png does not seem to contain any zTXt chunk (looking at the file with a hex editor seems to confirm that). And with sng 1.0.5 it seems to survive the roundtrip just fine.</p></div>