Normalize mp3 and flac files in currently directory using ffmpeg-normalize

ffmpeg-normalize-all.cmd

@echo off
REM Normalize mp3 and flac files in currently directory using ffmpeg-normalize
REM https://github.com/slhck/ffmpeg-normalize/
setlocal

goto :main

:normalize_file
setlocal

REM ~x includes the dot. We don't want that.
set _var1=%~x1
set ext=%_var1:~1%

REM Why -c:a ext ?
REM See https://github.com/slhck/ffmpeg-normalize#could-not-write-header-for-output-file-error
REM The conversion does not work and I get a cryptic ffmpeg error!

ffmpeg-normalize.exe --output-folder NORMALIZED --normalization-type rms --target-level -13 --force -c:a %ext% --extension %ext% "%~1"
endlocal
goto :eof

:main
for %%f in (*.mp3 *.flac) do (
  echo %%~f
  call :normalize_file "%%~f"
)