[ Thanks to eliteberserker for this link. ]
“If you are a multimedia junkie and felt it your karma
to convert tons of videos and music to popular formats, then FFMPEG
is the right tool for you. FFmpeg is a free video converter and so
much more.“It can be found in the default Ubuntu repository and also comes
pre-installed in most other distro’s. It’s an open source project
that contains an infinite number of libraries, the most noticeable
among them is the libavcodec (for encoding and decoding of the
audio and video data ) and libavformat( mux demux library).”