How to convert mp4 file to mp3 on ubuntu

How to convert mp4 file to mp3 on ubuntu

1.

 open terminal and type this command

ffmpeg -i source_filename -vn -ab 192k -acodec libmp3lame -ac 2 output_filenamer

 source :  #http://askubuntu.com/questions/84584/converting-mp4-to-mp3
#http://askubuntu.com/questions/13737/what-packages-do-i-install-for-ffmpeg-and-libmp3lame

Unknown encoder 'libmp3lame'

Unknown encoder 'libmp3lame'

How to solve "Unknown encoder 'libmp3lame'" message?

1.

sudo apt-get install ffmpeg

2.

you can also try to install the libmp3lame0 package:

sudo apt-get install libmp3lame0

sudo apt-get install libavcodec-extra-53

done!

i hope it solve your problem.

source :  #http://askubuntu.com/questions/84584/converting-mp4-to-mp3
#http://askubuntu.com/questions/13737/what-packages-do-i-install-for-ffmpeg-and-libmp3lame