if it may benefit anyone, i used this simple batch file to test out the lower bound -quality 84 with drag and drop of one/multiple images on win 86-64: echo

if it may benefit anyone, i used this simple batch file to test out the lower bound -quality 84 with drag and drop of one/multiple images on win 86-64: echo Drag and drop one or multiple jpg or png files onto this batch file, to compress with google guetzli using a psychovisual model if [%1]==[] goto :eof :loop echo compressing... guetzli_windows_x86-64.exe -quality 84 %1 "%~dpn1_guetzlicompressed%~x1" shift if not [%1]==[] goto loop echo DONE i'm concerned about the color changes that are clearly visible throughout the whole image.