Convert all WAV files in a directory to MP3 files.

convert-wav-to-mp3.bat

REM NOTE that this does NOT uninstall ffmpeg when done

@echo off
setlocal enabledelayedexpansion

echo Current directory: %cd%

REM Set the download URL for FFmpeg
set "ffmpeg_url=https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl.zip"

REM Set the temporary directory for downloading and extracting FFmpeg
set "temp_dir=temp"

REM Check if FFmpeg is already installed
if exist "%temp_dir%\ffmpeg-master-latest-win64-gpl\bin\ffmpeg.exe" (
    echo FFmpeg is already installed.
) else (
    echo Downloading FFmpeg...
    curl -L -o "%temp_dir%\ffmpeg-master-latest-win64-gpl.zip" "%ffmpeg_url%"
    if errorlevel 1 (
       echo FFmpeg download failed, please check your internet connection and the ffmpeg_url.
       exit /b
    )
    
    echo Extracting FFmpeg...
    powershell -Command "Expand-Archive -Path '%temp_dir%\ffmpeg-master-latest-win64-gpl.zip' -DestinationPath '%temp_dir%'"
    if errorlevel 1 (
        echo Failed to extract FFmpeg.
        exit /b
    )

    echo FFmpeg installation complete.
)

REM Set the path to the FFmpeg executable
set "ffmpeg=%temp_dir%\ffmpeg-master-latest-win64-gpl\bin\ffmpeg.exe"

REM Check if FFmpeg executable exists at the specified path
if not exist "%ffmpeg%" (
    echo FFmpeg executable not found at the specified path: "%ffmpeg%"
    exit /b
)
echo Found FFmpeg executable at: "%ffmpeg%"

REM Convert .wav files to .mp3
for %%A in ("%~dp0*.wav") do (
    set "input_file=%%~fA"
    set "output_file=%%~dpnA.mp3"
    echo Converting file: "!input_file!" to "!output_file!"
    "%ffmpeg%" -i "!input_file!" -vn -ar 44100 -ac 2 -b:a 192k "!output_file!"
    if errorlevel 1 (
        echo Failed to convert "!input_file!".
        exit /b
    )
)

echo Conversion complete.
pause