How to Convert WAV to MP3 using FFmpeg on Windows

Converting WAV audio files to MP3 format on Windows is a quick and straightforward process when using FFmpeg, a powerful command-line tool. This article provides the exact FFmpeg commands you need to perform this conversion, ranging from simple single-file conversions to high-quality settings and batch processing for multiple files.

Step 1: Open Command Prompt

First, open the Windows Command Prompt (CMD) or PowerShell. Navigate to the folder where your WAV file is stored using the cd command:

cd C:\path\to\your\audio\folder

Step 2: Run the Basic Conversion Command

To convert a WAV file to MP3 using FFmpeg’s default settings, run the following command:

ffmpeg -i input.wav output.mp3

Replace input.wav with your actual file name and output.mp3 with your desired output name.

Step 3: Convert with High Quality (Recommended)

By default, FFmpeg may compress the audio. To ensure a high-quality output, you can set a constant bitrate (CBR) of 320 kbps using the -b:a flag:

ffmpeg -i input.wav -b:a 320k output.mp3

Alternatively, you can use Variable Bitrate (VBR) by using the -q:a flag. A value of 0 or 1 provides the highest VBR quality:

ffmpeg -i input.wav -q:a 0 output.mp3

Batch Convert Multiple WAV Files to MP3

If you have a folder full of WAV files and want to convert all of them to MP3 at once, run this loop directly in your Windows Command Prompt:

for %i in (*.wav) do ffmpeg -i "%i" -b:a 320k "%~ni.mp3"

(Note: If you are using this command inside a Windows Batch script .bat file, use double percent signs %%i instead of %i.)