Converting a 3gp file in mobile to AVI in Ubuntu.
1) Install mencoder. (Must have repositories multiverse)
Type in terminal:
sudo apt-get install mencoder
2) At Command Line:
Converting a slingle file:
mencoder yourmovie.3gp -ovc lavc -lavcopts vcodec=msmpeg4v2 -oac mp3lame -lameopts vbr=3 -o yourmovie.avi