/var/www/img.caricoos.org/public_html/VIIRS/afai/merge/20200891612.png
/usr/bin/optipng -o2 


array(13) {
  [0]=>
  string(38) "OptiPNG 0.6.4: Advanced PNG optimizer."
  [1]=>
  string(37) "Copyright (C) 2001-2010 Cosmin Truta."
  [2]=>
  string(0) ""
  [3]=>
  string(85) "** Processing: /var/www/img.caricoos.org/public_html/VIIRS/afai/merge/20200891612.png"
  [4]=>
  string(43) "1650x1430 pixels, 4x8 bits/pixel, RGB+alpha"
  [5]=>
  string(31) "Input IDAT size = 4558565 bytes"
  [6]=>
  string(31) "Input file size = 4558643 bytes"
  [7]=>
  string(0) ""
  [8]=>
  string(7) "Trying:"
  [9]=>
  string(52) "  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4558565"
  [10]=>
  string(223) "  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5"
  [11]=>
  string(92) "/var/www/img.caricoos.org/public_html/VIIRS/afai/merge/20200891612.png is already optimized."
  [12]=>
  string(0) ""
}