‘QWinFF’ is an easy to use multimedia converter that is based on ‘ffmpeg’ and Qt. It runs on GNU/Linux and MS Windows, comes with GNU GPL licensed and is completely free to use.
Since it is based on ‘ffmpeg’, you can add pretty much any multimedia container format into it, and re-convert the audio/video tracks into a different one (with different settings), easily.
‘QWinFF’ also lets you manually set the range (‘cutting’) and change -- bit-rates, volume levels, sample rate, audio channels, crop, resize, deinterlace and manually pass command-line parameters to ‘ffmpeg’ as well.
It has just been updated to version 0.1.9 and now supports few additional output container formats (FLAC, ASF, SWF, AIFF, AU & MP2), update checker, an option to enable (disabled by default) conversions as soon as files are added, new ‘Start’ button, ability to change several program executable paths, hides unsupported formats, added compatibility with newer ‘ffmpeg’ releases are a few to mention.
Installing it on Ubuntu 13.10, 13.04, 12.10, 12.04 LTS and Elementary OS Luna …
sudo apt-add-repository ppa:lzh9102/qwinff
sudo apt-get update
sudo apt-get install qwinff
I have tested it under Elementary OS Luna and it worked flawlessly.
To read the full change-log and install instructions for other distributions, please visit this page.