One may edit the command line sent to ffmpeg to fit all of his needs, but for those cases the more command line oriented tools (with nice GUI’s too) could be the better choice. But if you need a tool for click oriented and flawless conversion like stripping an mp3 from a youtube movie, resizing and recoding a clip to fit your mobile’s screen or just changing the format of a movie-file to be able to play it in a flash-media-player – traGor may be Mr. Right for you.
Install traGtor in ubuntu
Open the terminal and run the following commands
sudo apt-key add PublicKey
echo "deb http://repository.mein-neues-blog.de:9000/ /" | sudo tee -a /etc/apt/sources.list
sudo apt-get update
sudo apt-get install tragtor