There are two methods by which you should convert any video in audio on Ubuntu 14.04.

1. Through command line
2. By using GUI

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Through command line:

First you should install avconv. Just type two command in a terminal for installation.

$ sudo apt-get update
$ sudo apt-get install libav-tools

Writing the given below command for converting video into audio.

$ avconv -i amrit.mp4 -f mp3 amrit.mp3

Some points about the above command:

• Don’t forget to replace the input file name with your video file name.
• -i amrit.mp4 is the file that we want to convert (-i = -input).
• -f mp3 is the format we want our output file to use it, you can switch to “wav” or “webm” if you want.
• amrit.mp3 is the name of the output file.

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By using GUI:

1. First step you should install winff. For installing winff open a terminal and type the following commands:

   $ sudo apt-get install winff libavcodec-extra

2. Second step is to open winff. Write a single command to open winff.

   $ winff

   By writing a above command Winff window is open like this

   

3. Then in Winff window, do these
   • Add file
   • Select what catagory to convert (select Audio)
   • Select Audio file format (mp3)
   • Type the output folder for converted file

   For example :

   

4. Then click the Convert button.