picture

@echo off

setlocal enabledelayedexpansion

for /f "delims=" %%i in ('dir /b /s %1') do (

echo %%i

identify -format "%%[fx:w] %%[fx:h]" %%i > %%i.txt

for /f "tokens=1,2" %%a in (%%i.txt) do set width=%%a&set height=%%b

rm %%i.txt

echo width:!width!, height:!height!

if !width! LSS 600 (

"C:/Program Files/ImageMagick-6.9.3-Q16/convert.exe" %%i -quality 80 %%i.jpg

) ELSE (

"C:/Program Files/ImageMagick-6.9.3-Q16/convert.exe" %%i -resize 600 -quality 80 %%i.jpg

)

del %%i
)

install: http://www.imagemagick.org/script/binary-releases.php