How to install mp3 plugin? [duplicate]

I just installed Ubuntu desktop 13.04 in my computer, dual boot with windows 7.

How to install mp3 plugin? Because I want to listen to music and watch movie, but the player requires plugin? How to solve this problem?

Type in terminal:

sudo apt-get install ubuntu-restricted-extras

Hope it works!

1) Try to open terminal and run following command to install mp3 library:

$ sudo apt-get install libmp3lame0

2) I don't think so. On the contrast, I think network speed is higher than Windows because of more efficient network applications. If you feel software update slow, you can change repository source by detecting the fastest source automatically.