Ubuntu
lame package

Mplayer & Lame command

Asked by KKevin901

Try to convert realaudio audio file to mp3 format for MP3 player playing back. Browse around on web and learned the following command lines. It works but the playback audio volume is too low that almost cannot hear.

Would like to get advise on the following command if anyway to boot up the output audio gain:

#Rip with Mplayer / encode with LAME
for i in *.ra ; do mplayer -vo null -vc dummy -af resample=11025 -ao pcm:waveheader $i && lame -m s audiodump.wav -o $i; done
#convert file names
for i in *.ra; do mv "$i" "`basename "$i" .ra`.mp3"; done
rm audiodump.wav

Thanks

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mycae (mycae) said : 		#1

Use the audio editor "audacity" to change the volume level. Its pretty straightforward.

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mycae (mycae) said : 		#2

Oh, if you are doing batch, you may want to look at the package normalize-audio

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KKevin901 (kkevin901) said : 		#3

The audacity works. But it takes many steps on graphical process.

I have the above command lines put onto a script. It will be perfect if someone can advise to twist the above command lines instruction to add the normalize-audio or gain control. As it will then be a one step command line simple instruction.

Thanks

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mycae (mycae) said : 		#4

add at the end of your script:

for i in *.mp3; do normalize-audio --amplitude=-12dBFS $i ; done

after installing the normalize-audio program.

Note that the above will fail if your filenames have spaces in them

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