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1. 

   theCAS
   Member

   I have an idea for a fast mode to cut compression time.
   You can set a minimum size reduction (eg. 0.1%) and if in a pass the gain less than that the optimization for that file is halted.
   
   

   
Output: C:\DOCUME~1\AMMINI~1\IMPOST~1\Temp\Homunculus v01p261 copy.png coltype:6 (RGB+Alpha) filter:5 (mixed)

 Input size:  356248 bytes



Output size:  421819 bytes -  80533.125 ->  341285.875

Output size:  330685 bytes -   3886.875 ->  326798.125

Output size:  325630 bytes -     93.125 ->  325536.875 <---almost useless

Output size:  325492 bytes -     21.750 ->  325470.250 <---almost useless

Output size:  325462 bytes -      2.000 ->  325460.000 <---useless

Output size:  325452 bytes -      0.750 ->  325451.250 <---very useless!

Output size:  325448 bytes                               
     Change:  -30800 bytes ( 91% of original)


   
   
   As you can see the last 4 passes makes the png only 120bytes smaller, stopping at the third pass result would have cut the processing by an half, stopping at the second by 66%.
   
   Sorry for my english and keep up the good work!

   Posted 5 years ago #
2. 

   brh
   Key Master

   Not a bad idea.

   Posted 5 years ago #
3. 

   counting_pine
   Member

   I personally like to squeeze every last bit out of PNG files, but I think this feature could be very useful when trying to see if an image can be optimised. If the pass sizes don't look like they are going to end up lower than the original size, then PNGOUT can be aborted early without compromising the file size at all. (If they do, I'll want to run PNGOUT all the way:)

   Posted 4 years ago #

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