I'm tring to make a cool little frontend for myself for png recompression(Control parameters and redirect the program outputs). It uses much more than just pngout, so I hope it doesn't interfere with your pngoutwin persuits to answer.
Is there methodology for the number of passes that pngout makes on an image? I'm tring to figure out a percentage done. I've tried to make sense of it, but its not been fun.
To clarify a 'pass', when pngout outputs this:
Output size: X bytes - Y -> (X - Y)
It seems to do this an indeterminate number of times.
Awesoken at
Sorry, there is no way to determine the total percentage done with any kind of accuracy. PNGOUT decides when to do another pass at the end of each pass.