A Quck MP4 toMP3 converter?

[Geek-9pm]

Instead of searching Google, I thunk it would be easier to just ask. 
I have a nice confection MP4 music clips. I wood like to put the audio on an iPod device. Either MP3 or WAV.  It should not hard to do. Right?
Does anybody know of a quick easy way to do this? 

[Salmon Trout]

ffmpeg

[2x3i5x]

I like to use xmedia recode to convert between different filetypes. It's fast, free and just does its job.

Of all the various filetypes that it can support and convert into, mp3 is one of them.

[Salmon Trout]

To make an mp3 from every mp4 in a folder

This is at the prompt,

for %A in (*.mp4) do ffmpeg -i "%A" -b:a 192K -vn "%~nA.mp3"

In a batch script double up the % signs so % becomes %% like this...

for %%A in (*.mp4) do ffmpeg -i "%%A" -b:a 192K -vn "%%~nA.mp3"

Makes an mp3 with the same name as the mp4 so

Song Name.mp4 ---> Song Name.mp3

Where it says 192K that is the bitrate of the output mp3, could be 64K, 128K, 320K etc

[Geek-9pm]

Thank you. I will use it right away.