@echo off
cd /d "%~dp0"
for /r /d %%d in (*) do (
	set /a d+=1
	for %%a in ("%%d\*.jpg") do (
		for /f %%m in ('certutil -hashfile "%%a" MD5 ^| find /v ":"') do (
			set /a #%%m+=1
			set _"%%a"="md5:%%m"
		)
	)
	for /f "tokens=1-2 delims=#=" %%a in ('set #') do (
		setlocal enabledelayedexpansion
		if %%b neq !d! (
			endlocal
			set #%%a=
			for /f tokens^=2delims^=^" %%a in ('set _ ^|find "md5:%%a"') do (
				set _"%%a"=
			)
		) else (
			endlocal
		)
	)
)
for /f tokens^=2delims^=^" %%a in ('2^>nul set _') do (
	rem "结果正确，删除echo 再次执行"
	echo ren "%%a" "newname.jpg"
)
pause
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@echo off &setlocal enabledelayedexpansion
pushd "%~1" &set "lastZ=0"
(powershell "dir -file -filter *.jpg -r|select -pr length, fullname|sort -pr length|ft -auto")|more +3>0.tmp
for /f "tokens=1* delims= " %%a in (0.tmp) do (
	set "ok=0" &if "%%a"=="!lastZ!" (
		fc /b "%%~fb" "!lastF!">nul 2>nul && (set "ok=1" &ren "%%~fb" "!lastnF!")
	)
	if !ok! equ 0 (set "lastF=%%~fb"&set "lastZ=%%a"&set "lastnF=%%~nxb")
)
del/q "0.tmp"&popd&endlocal&pause&exit/b
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@echo off
setlocal enabledelayedexpansion

for /f "usebackq tokens=* delims=" %%a in (` dir /s /b "*.jpg" `) do (
	for /f "usebackq tokens=* delims=" %%b in (` certutil -hashfile "%%~a" MD5 ^| find /v ":" `) do (
		if defined _%%b_ (
			echo ren "%%~a" "!_%%b_!"
		) else (
			set _%%b_=%%~na
		)
	)
)
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