dmMediaConverter is a FFmpeg frontend (GUI) exposing some of its features. It is intended to be simple and easy to use but also to be able to achieve complex tasks. I have inspired myself from a lot of media converters like Handbrake, WinFF and MkvMergeGui. One feature was lacking from most of them, video stream copy (pass through), that made me build this.
For download and more details, here: http://dmsimpleapps.blogspot.com/201...converter.html
UPDATE: DEB files are available for x86 and x64!
Now you can download it from Ubuntu Software Center! Here it cost 3$ and it will be considered a donation. It takes time to get the app updated into Ubuntu repository.