I ran into this when installing openframeworks 0.9 on Ubuntu 15.10
Don’t ask why I would use Ubuntu 15.10. Here’s the issue: when installing packages that OF requires, you’ll run into a dependency issue that doesn’t seem easy to solve. Unless you’re ready to take a little risk.
I’ve removed some ffmpeg package that seemed to be in the way:
sudo apt-get purge libavcodec-ffmpeg-extra56:amd64
which removes a few more packages and takes down ubuntustudio-audio and ubuntustudio-video. Wow, that sounds serious. But in the end the effects don’t seem that dramatic as this doesn’t really remove all the audio and video apps and when this is out of the way you’re ready to install all these packages that were previously incompatible.
Don’t ask why it works. It works.
Oh and before you run the openFrameworks installer, install ‘curl’. That will save you a couple of minutes down the road.