autogif.bat

::by cale bradbury netgrind.net
::requires imagemagick to be installed
::call autogif.bat from the cmd line with the output name of the gif
::>autogif.bat gifname.gif
@echo off
cd %~dp0
SET numColors=256
:while1
echo creating gif with %numColors% colors
convert *.png -colors %numColors% %1
SET  /a gifFileSize=%~z1/1024/1024
echo gif size %gifFileSize% MB
if %~z1 gtr 2097152 (
    SET /a "numColors=%numColors%/2"
    if %numColors% gtr 8 (
        goto :while1
    )
)