Comment 2 for bug 1391109

Is not an Openshot bug, it's related to those packages: libmlt6 and libmlt++3

In the following link there is a solution to render any video with audio.
https://askubuntu.com/questions/541635/no-audio-in-rendered-video-files/548279

I'm using Ubuntu 14.10 64bits an it works for me.