Convert MP4 to MP3

Using FFmpeg for Audacity command line tool, here’s a simple batch file that lets you drag a series of MP4 files on top of the batch file, and it will convert them all to MP3.

@echo off
if [%1] == [] goto done
set args=%1
"c:\Program Files (x86)\FFmpeg for Audacity\ffmpeg.exe" -i %args% %args%.mp3
goto start

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