[文件操作] [已解决]批处理ffmpeg单视频根据音频时长拼接的问题

@echo off
cd /d "%~dp0"
for %%a in (wav mp4) do (
	for %%i in (*.%%a) do (
		for /f "delims=" %%j in ('ffprobe -v error -show_entries format^=duration -of default^=noprint_wrappers^=1:nokey^=1 "%%i"') do (
			if not defined target_duration (
				for /f "delims=" %%k in ('powershell -c "%%j+5"') do (
					set target_duration=%%k
				)
			) else (
				set video_duration=%%j
			)
		)
	)
)
for /f "tokens=1 delims=." %%a in ('powershell -c "%target_duration% / %video_duration% + 1"') do (
	for %%b in (*.mp4) do (
		(for /l %%l in (1,1,%%a) do (
			echo file '%%~fb'
		))>x.txt
	)
)
ffmpeg -f concat -safe 0 -i x.txt -t %target_duration% -c copy output1.mp4
del x.txt
pause
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ffmpeg version 6.0-essentials_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
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