traGtor is a highly popular graphical user interface (GUI) for the de-/encoders FFmpeg and AVconv. It is exclusively developed for Linux desktops using GTK and is written in Python. traGtor was introduced in 2007 and has significantly enhanced since. It is available in seven languages by now and was downloaded hundreds of thousands of times from my personal DEB repository. traGtor is ported to most of the Linux distributions and is on-hand in all major package management systems.
The program was mentioned in an article in the popular computer magazine "c't" in 2009.
The image gallery shows the different pages of traGtor, the video below explains how to join a JPG and a MP3 to create a MP4 video with a still image.
xplanetFX - Real Time Earth Wallpapers for Linux Desktops
Calf Studio Gear - Professional Studio Equipment for Linux Desktops
traGtor - Convert Audio and Video Files Via ffmpeg/avconv in Linux
toolkit. - An Audio Related Graphical Toolkit in JavaScript and CSS
An Overview Over Some Graphical Impressions
An Overview over Some Musical Impressions
Jammin*INC - One of the First Creative Commons Bands From Europe