image minify in windows

GIF

# gif > png8
@echo off
set CONVERT=D:\Software\PIC\ImageMagick-6.8.3-6\convert.exe
    for %%a in (%*) do (
        dir /a %%a|findstr "DIR" >nul 2>nul && (
            "%CONVERT%" %%a "%%~dpna.png\*"
        ) || (
            "%CONVERT%" %%a "%%~dpna.png"
        )
    )

JPEG

# jpg > tran > progressive jpeg
@echo off
set JPEGtran=D:\Software\PIC\jpegtran\jpegtran.exe
    for %%a in (%*) do (
        dir /a %%a|findstr "DIR" >nul 2>nul && (
            "%JPEGtran%" -copy none -optimize -perfect %%a "%%~dpna_tran%%~xa"
            rename "%%~na%%~xa" "%%~na_0%%~xa"
            "%JPEGtran%" -copy none -optimize -perfect -progressive "%%~dpna_tran%%~xa" "%%~dpna_tran_p%%~xa\*"
        ) || (
            "%JPEGtran%" -copy none -optimize -perfect %%a "%%~dpna_tran%%~xa"
            rename "%%~na%%~xa" "%%~na_0%%~xa"
            "%JPEGtran%" -copy none -optimize -perfect -progressive "%%~dpna_tran%%~xa" %%~dpna_tran_p%%~xa
        )
    )

PNG

# png > 8bit > crush
set PNGquant=D:\Software\PIC\PNGquant\pngquant.exe
set PNGcrush=D:\Software\PIC\pngcrush\pngcrush.exe
    for %%a in (%*) do (
        dir /a %%a|findstr "DIR" >nul 2>nul && (
            "%PNGquant%" -ext _8bit.png -iebug -force -verbose 256 %%a
            rename "%%~na%%~xa" "%%~na_0%%~xa"
            "%PNGcrush%" -rem alla -brute -reduce "%%~dpna_8bit%%~xa" "%%~dpna%%~xa\*"
        ) || (
            "%PNGquant%" -ext _8bit.png -iebug -force -verbose 256 %%a
            rename "%%~na%%~xa" "%%~na_0%%~xa"
            "%PNGcrush%" -rem alla -brute -reduce "%%~dpna_8bit%%~xa" %%~dpna%%~xa
        )
    )