OGG is a common, widely used, and the default audio format in Linux. But sometimes, maybe you need to run your OGG collections in an old MP3 player. If so, there is a great tool called ogg2mp3 that can be used to convert massive OGG files into MP3 in one single process.
You could get the .deb of ogg2mp3 in its Google Code page. This script depends on lame, so you need to install lame first : sudo apt-get install lame.
1. Go to the path where your ogg collections located
2. Run the following command :
ogg2mp3 *.ogg *.mp3