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@echo off & cd /d "%~dp0"
set "ext_dir=_文件夹内视频合并"
for /f "delims=" %%i in ('dir /b /ad ^| findstr /ve /C:"%ext_dir%"') do (
	for /d %%a in ("%%i\*") do (
		( for %%b in ("%%a\*.mp4") do echo file '%~dp0%%b' )>"list.txt"
		mkdir "%%~nxi%ext_dir%\%%~nxa" 2>nul
		echo %%a
		ffmpeg -f concat -safe 0 -y -i list.txt -c copy "%%~nxi%ext_dir%\%%~nxa\%%~nxa.mp4" 2>nul
		echo %%~nxi%ext_dir%\%%~nxa\%%~nxa.mp4
		echo -----------------
	)
)
del /f "list.txt" 2>nul
pause&exit
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