were do i enter the code

how can i change my mp4 into a mp3

how can i change my mp4 song into a mp3 song

Very good idea. I added it myself.

Mr.Lliman1 you will need basic computer knowledge to use a simple script.

This thread is about a script to convert m4a files to mp3.

If you want to convert mp4 songs then the script is the same but I would change the content as followed:

#!/bin/bash
#
# mp4 to mp3 and tag transfer
# for music from iPod

# This software is licensed under the GNU General Public License
# For the full text of the GNU GPL, see:
#
# http://www.gnu.org/copyleft/gpl.html
#
# No guarantees of any kind are associated with use of this software.

#requirements: faad, lame

#Begin
clear

# variables
version=0.1a

current_directory=$( pwd )

for i in *.mp4
do
faad "$i"
x=`echo "$i"|sed -e 's/.mp4/.wav/'`
y=`echo "$i"|sed -e 's/.mp4/.mp3/'`
faad -i "$i" 2>.trackinfo.txt
sed -i '23s/unknown: /title: /' .trackinfo.txt
sed -i '24s/unknown: /artist: /' .trackinfo.txt

year=` grep '^unknown:[[:space:]]*[[:digit:]]*[[:space:]]*$' .trackinfo.txt|sed -e 's/unknown: //'`
sed -i 's/^unknown:[[:space:]]*[[:digit:]]*[[:space:]]*$/year: /' .trackinfo.txt

#If you get year problems use this instead
#year=`grep 'date: ' .trackinfo.txt|sed -e 's/date: //'`

sed -i 's/unknown: iTunes/iTunes: iTunes/' .trackinfo.txt

genrecount=`grep -c 'genre: ' .trackinfo.txt`
unknowncount=`grep -c 'unknown: ' .trackinfo.txt`

if [ "$genrecount" -eq 1 ] && [ "$unknowncount" -eq 2 ]; then
sed -i '25s/unknown: /composer: /' .trackinfo.txt
sed -i '26s/unknown: /album: /' .trackinfo.txt
genre=`grep 'genre: ' .trackinfo.txt|sed -e 's/genre: //'`
fi

if [ "$genrecount" -eq 1 ] && [ "$unknowncount" -eq 1 ]; then
sed -i '25s/unknown: /album: /' .trackinfo.txt
genre=`grep 'genre: ' .trackinfo.txt|sed -e 's/genre: //'`
fi

if [ "$genrecount" -eq 0 ] && [ "$unknowncount" -eq 3 ]; then
sed -i '25s/unknown: /composer: /' .trackinfo.txt
sed -i '26s/unknown: /album: /' .trackinfo.txt
sed -i '27s/unknown: /genre: /' .trackinfo.txt
genre='other'
fi

if [ "$genrecount" -eq 0 ] && [ "$unknowncount" -eq 2 ]; then
sed -i '25s/unknown: /album: /' .trackinfo.txt
sed -i '26s/unknown: /genre: /' .trackinfo.txt
genre='other'
fi

title=`grep 'title: ' .trackinfo.txt|sed -e 's/title: //'`
artist=`grep 'artist: ' .trackinfo.txt|sed -e 's/artist: //'`
album=`grep 'album: ' .trackinfo.txt|sed -e 's/album: //'`
track=`grep 'track: ' .trackinfo.txt|sed -e 's/track: //'`

lame --alt-preset 192 --id3v2-only --tt "$title" --ta "$artist" --tl "$album" --tg "$genre" --tn "$track" --ty "$year" "$x" "$y"
rm .trackinfo.txt
rm "$x"
mv "$y" "$artist - $title - $album.mp3"
rm "$i"
done

#If you get bad characters errors use this instead
#rm "$x"
#artist=`echo $artist | sed -e 's/\//_/'`
#mv "$y" "$artist - $title.mp3"
#rm $i
#done

This script will convert all files with the given extension to mp3 files:

usage tomp3.sh wma (converts all wma files to mp3)
This script needs mplayer, lame and transcode to work, so you will
need the appropriate packages.

Just put this in your executable path somewhere....

-------------------------------------------------------------
remove_spaces=1

tmp_file="/tmp/pcm_audio"

function rm_spaces() {
mv "$1" `echo $1 | tr ' ' '_'`
}

function tomp3() {
ext=$1

for i in *.$ext
do
if [ -f "$i" ]; then
dest=`basename "$i" .$ext`

if [ "$ext" = "ogg" ]; then
echo "Encoding $i to "$dest".mp3"
transcode -q 0 -i "$i" -o "$dest" -y null,lame 2>/dev/null
else
rm -f "$tmp_file"
mkfifo "$tmp_file"

#echo "Ripping $i"
mplayer -quiet -vo null -vc dummy -af volume=0,resample=44100:0:1 -ao pcm:waveheader:file="$tmp_file" "$i" &>/dev/null &

echo "Encoding $i to "$dest".mp3"
lame --quiet -m s -h -b 192 -V0 --vbr-new "$tmp_file" "$dest".mp3

# remove temp file
rm -f "$tmp_file"

fi
# remove spaces
if [ $remove_spaces -eq 1 ]
then
rm_spaces "$dest".mp3
fi
fi
done

echo "done."
}

case "$1" in
ogg)
tomp3 ogg
;;
wma)
tomp3 wma
;;
m4a)
tomp3 m4a
;;
*)
echo "Usage: tomp3.sh m4a|wma|ogg"
exit 1
esac

exit 0

great script! you don't really need to move the files at the end. i just let the filename stay the same. if you do change it you need to make sure trakes < 10 have a 0 in front of it for sorting. has ANYBODY found a real configurable script for the written in perl or something of the like?

i haven't tried the script yet, but would like to do that soon. still, i'd prefer a program with interface. can anyone provide that!?

regards
ungua

If you haven't used one of the scripts yet, you should try the first one. There is no need for a GUI, all you have to do is fire up the script and let it crawl through your files, making them into mp3's.

I had to modify the script to get it to transcode my m4a's, but that was a 30 second find/replace with kwrite, otherwise is the exact same as was posted above.

http://mlinks.net/~scottm/m4a_to_mp3.sh

To use it:
0) Save the file above.
1) Place it in the same folder as the audio files you wish to transcode, or copy them into the folder containing the script.
2) From a terminal as normal user: chmod +x m4a_to_mp3.sh
3) Still in the terminal: ./m4a_to_mp3.sh
4) Sit back and watch, then enjoy your mp3's.

Note that this does replace the m4a files, so if you want to keep them as m4s'a as well, backup them up somewhere.

Hope this helps someone, the script was really handy to me!

Scott McNeely

SteelJ, thank you very much for all of the time that you spent on the script. I have used it for the basis for another script which handles recursively walking a directory and alternative directory names. If anyone is interested I have posted it:
(sorry I would have posted it here but it got very long)

(Sorry about the double post, limitation of the site prevented me from posting the URL)

SteelJ, thank you very much for all of the time that you spent on the script. I have used it for the basis for another script which handles recursively walking a directory and alternative directory names. If anyone is interested I have posted it:
http://www.minigeek.org/index.php/20...ript/#more-116

(sorry I would have posted it here but it got very long)

Thanks man,

I dowloaded it and will use this one instead of the old one.

Feature of the site. It is by design rather than by accident.

I have used a similar tool called M4A to MP3 Converter whihc work on windows, but not on linux.

You could just install libmp4 and ecasound.If you want to convert to .mp3 just run in the folder containing the files ecaconvert .mp3 *.mp4.Simple.Change the .mp3 to .wav .flac .ogg depending on what output you need.