Want to change a bunch of mp3 files to smaller bitrate

[happydog500]

I went to a convention and recorded 49 talks. I edited in Audacity, put them in a folder as mp3 for my ipod.
I used 129 for the bitrate. Since all the files are just a little to big for my old ipod, I want to make them smaller. Since it's just speeches, 64 should do just fine.

I'll have to open each, 49 files, in Audacity, one at a time. Save them at 64. Is there a way to take the whole folder and do it without having to do each file separate?

Thank you,
Chris.

[rallymax]

try MediaCoder (it's free).
it can batch process 20 at a time. more than that you need pro.

http://mediacoder.sourceforge.net/

[usta]

There are many tools available for MP3 to MP3 batch conversion.
In addition to Mediacoder, you can use Bonkenc or Format Factory (both have a small footprint on the PC).

[Xpenguin17]

Uh, why not just use LAME, do something like:

lame Track1.mp3 -o Track1.wav --decode
lame Track1.wav -o Track1.mp3 --abr 64 -q 0 --resample 22

lame Track2.mp3 -o Track1.wav --decode
lame Track2.wav -o Track1.mp3 --abr 64 -q 0 --resample 22

lame Track3.mp3 -o Track1.wav --decode
lame Track3.wav -o Track1.mp3 --abr 64 -q 0 --resample 22

...

?

[Gavino]

Uh, why not just use LAME, do something like:
lame Track1.mp3 -o Track1.wav --decode
lame Track1.wav -o Track1.mp3 --abr 64 -q 0 --resample 22
etc

I imagine the idea was to avoid having to type that lot 49 times, each time getting the filename correct.
OK, it's not difficult, but tedious.

Now if you were to suggest a batch script cycling over the files in the folder, I would agree with you...

[rallymax]

this dos command script (mp3-resize.cmd) should do the trick... It's borrow heavily from an MEncode.cmd that batch processed HD mjpeg into HD mpeg2.

@echo off
:: Loop through all input files
for /f "usebackq delims=" %%i in (`dir /b "%~1"`) do call :ConvertThis "%~dp1%%i"
goto :eof

::
:: End of script. Subroutines follow.
::

:ConvertThis

:: Safety check for output file existence
if not exist "%~dpn1.mp3" goto ConvertNow

echo.
echo WARNING: Output file %~dpn1.mp3 already exists. Corresponding source file will not be converted again.
echo.
goto :eof

:ConvertNow
:: Lame it!

lame "%~1" -o "%~dpn1.wav" --decode
lame "%~dpn1.wav" -o "%~1.mp3.new" --abr 64 -q 0 -resample 22

goto :eof

EDIT: Oh, you call it with mp3-resize *.mp3

[SanderMan]

I use all2lame for things like this. find it here:

http://members.home.nl/w.speek/all2lame.htm