‘QWinFF’ is an extremely easy to use, ‘ffmpeg’ based multimedia converter for GNU/Linux & Windows. I have been checking it out from time to time & with each release, it gets better and better.
With ‘QWinFF’ you can convert a huge number of input formats (anything that ‘ffmpeg’ supports!) into a large array of others (MP4, MKV, WMV, AC3, FLV, OGG, WEBM, AVI …) and it also supports resizing, cropping, bitrate adjustments, volume gaining, audio channel changing, cutting and many more.
The latest version is 0.2.0 (released on February 9, 2014), & now ‘QWinFF’ comes with a dedicated video cutting window that has live previews, including few more changes as well.
sudo apt-add-repository ppa:lzh9102/qwinff
sudo apt-get update
sudo apt-get install qwinff
That should do it. Please visit this page for instructions on how to install it on other distributions (Fedora, Linux Mint, openSUSE …) and MS Windows.