Comment 9 for bug 481500

Humm sk8dork
With this commands, we tried (Jonathan and me) to help you. More you are precise more we are some lucks to help you.
This commands tell us severals things.
First, the melt wasn't installed and it's the reason why you haven't none answer to the Jonathan's commands.
Seconds, you have a big probleme with ffmpeg and libx264 same if it's installed.(libx264 for the audio and ffmpeg for mp3)
Third you have done severals installations with severals methods and i think that you have some "remainders".
What can you do ? It's a good question.
Perhaps tried in virtualbox or tried another things. Do you use the medibuntu depot for ffmpeg (Penguin Liberation Front) ?
if not installed it and update your packets and tried again.
if not good you can all de-installed (openshot and his dependencies) same their are hided (see here for mlt : https://bugs.launchpad.net/openshot/+bug/480894 and .openshot in /home) and re-installed by the ppa (the last)
After, really i don't know. Good luck