Here's how you can install Format Junkie in Ubuntu 14.04. Format Junkie lets you convert a large range of different audio and video file formats.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo add-apt-repository ppa:noobslab/apps
sudo apt-get update
sudo apt-get install formatjunkie
According to Noobs Lab:
In addition to audio, video, and disc image files, this converter even converts images and converts all the popular formats! A Graphical User Interface user-friendly application with lots of options, which can convert your media files to all the popular formats!More at Noobs Lab
Format Junkie has a page up on SourceForge that you might also find useful. It has a list of formats that the application can convert.
According to Format Junkie at SourceForge:
Specifically, it has the following features:
Conversion between the audio formats: mp3, mp2, wav, ogg, wma, flac, m4r, m4a and aac
Conversion between the video formats: avi, ogv, vob, mp4, vob, flv, 3gp, mpg, mkv, wmv
Conversion between the image formats: jpg, png, ico, bmp, svg, tif, pcx, pdf, tga, pnm
Create an iso with selected files, convert iso to cso and vice versa.
Encode subtitles to an avi file.More at Format Junkie at SourceForge
Additional Ubuntu resources