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Converting videos to wav files and mp3 files



Works with OpenBSD systems. Useful with YouTube videos or wav files from CDs.

To convert all mp4 files to wav or mp3.

faad lame libmp3lame and mplayer or ffmpeg are needed. Single files may also be converted, without a script.

To convert mp4 videos to mp3 files:

mp4 to mp3

script called: mp4-mp3.sh
#!/bin/sh
#
# mp4 to mp3
#
for i in *.mp4; do
    echo $i
    out=$(echo $i | sed -e 's/.mp4//g')
    echo $out
    faad -o - $out.mp4 | lame - $out.mp3
done

Or you may use this script instead:

script called: mp4-mp3.sh
#!/bin/sh
#
# mp4 to mp3
#
for i in *.mp4; do
    out=$(ls $i | sed -e 's/.mp4//g')
    echo "In = $i"
    echo "Out = $out.mp3"
    ffmpeg -vn -i "$i" -vn -ac 2 -ab 128k -acodec libmp3lame "$out.mp3"
done

mp4 to wav

To convert mp4 videos to wave files:

script called: mp4-wav.sh
#!/bin/sh
#
# mp4 to wav
#
for i in *.mp4; do
    echo $i
    out=$(echo $i | sed -e 's/.mp4//g')
    echo $out
    mplayer -vc null -vo null -ao pcm:fast "$i" -ao pcm:file="${out}.wav"
done

Or you may use this script instead:

script called: mp4_to_wav.sh
#!/bin/sh
#
# mp4 to wav
# 
for i in *.mp4; do
        out=$(ls $i | sed -e 's/.mp4//g')
        echo "In = $i"
        echo "Out = $out.wav"
        faad -o "$out.wav" "$i"
done

Both together

You may also do both jobs all at once like this:

script called: mp4_to_all.sh
#!/bin/sh
#
# mp4_to_all
#
echo "current directory =" `pwd`
echo "Please enter working directory:"
echo
read BASE
cd $BASE

##########################
# 
# mp4 to wav
# 
for i in *.mp4; do
    out=$(ls $i | sed -e 's/.mp4//g')
    echo "In = $i"
    echo "Out = $out.wav"
    faad -o "$out.wav" "$i"
done

##########################
# 
# wav to mp3
# 
for i in *.wav; do
    out=$(ls $i | sed -e 's/.wav//g')
    echo "In = $i"
    echo "Out = $out.mp3"
#   lame -h -b 128 "$i" "$out.mp3" #use this line instead of following if your mp3 player cannot do variable bitrate mp3s
    lame -V2 "$i" "$out.mp3"
done

You may also do single files like this:

lame -h -b 128 "badsong.wav" "badsong.mp3"
faad -o "badsong.wav" "badvideo.mp4"
mplayer -vc null -vo null -ao pcm:fast "badvideo.mp4" -ao pcm:file="badsong.wav"
ffmpeg -vn -i "badvideo.mp4" -vn -ac 2 -ab 128k -acodec libmp3lame "badsong.mp3"

To convert all wav files to a CD. This works for OpenBSD. Insert a blank CD, then:

cdio -f cd0c tao -a *.wav

To put all mp3 files onto a CD. This works for OpenBSD.

mkhybrid -R -o mp3s.iso /home/whoever/mp3 (use directory where mp3s are at)
cdio -f cd1c tao mp3s.iso

To play it, use a CD or DVD player that plays mp3s or:

sudo mount /dev/cd0c /mnt
mplayer /mnt/*.mp3

To copy a CD or get wav files from it to make mp3s:

cdio -f cd1c cdrip

This gives you all of the songs in wav files, copy as above or make mp3s.

How to play a DVD

mplayer dvd://

How to play a CD

cdio cdplay (with track numbers if wanted or plays whole CD)
Ctrl-c (to stop playing)

Or you may play in analog with:

cdio play
cdio next
cdio previous
cdio stop
cdio eject
cdio close
cdio quit

How to get OpenBSD?

You may install it onto your system, go to OpenBSD. Be sure to look at FAQ page: FAQ
Or you may make a live USB drive, go to Live-USB OpenBSD.



Last Updated: January 8, 2010