WinFF is a easy to use graphical interface to the command line FFmpeg video and audio tool. WinFF makes it easy to encode many videos to a wide range of formats all at once. Its FFmpeg back-end should handle just about any video you have.
Visit WinFF’s download page and select the latest Debian/Ubuntu package. Download and install the package.
Because WinFF is a front-end for FFmpeg, the video formats you will be able to use depends on your version of FFmpeg. Ubuntu’s repositories have a version that does not support some popular video types, including H264 and AAC. You can get a more complete FFmpeg by installing Medibuntu’s version.