@echo off&cd /d %~dp0&title 批量修改图片尺寸
setlocal enabledelayedexpansion

if not exist "C:\Windows\System32\nconvert.exe" (
    echo 没有nconvert,请前往下面地址下载，放入C:\Windows\System32
    echo,http://bcn.bathome.net/s/tool/index.html?key=nconvert
pause&exit /b
)

set /p "str=请输入高或宽最大像素："
for /f "delims=" %%a in ('dir /ad /b /s *') do (
    pushd "%%a"&echo.&echo 进入 "%%a" 文件夹查找图片. . .
    for /f "delims=" %%b in ('dir /a-d /b "*.jpg" "*.png"') do (
        for /f "tokens=1* delims=:" %%i in ('nconvert.exe -info "%%b"^|findstr /i /l /c:"Width"') do set W=%%j&set W=!W: =!
        for /f "tokens=1* delims=:" %%k in ('nconvert.exe -info "%%b"^|findstr /i /l /c:"Height"') do set H=%%l&set H=!H: =!
            if !W! leq !H! (set W=0&set H=!str!) else (set W=!str!&set H=0)
		nconvert -rmeta -quiet -overwrite -out jpeg -ratio -resize !W! !H! -c 8 -o "%%a\%%~nb.jpg" "%%~nxb"
    )
    popd
)
echo.
echo,修改图片完成. . .
pause&exit /b
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