Development Instructions for HeadUnit Desktop
I created this document mostly for myself to document the steps to contribute in the headunit-desktop project, but I thought it can help one or two.
I continue writing on it and some points may be incomplete or even wrong.
Feel free to leave feedback in the comment section. For discussions there's a 
You can simply follow @viktorgino's build and install instructions for headunit-desktop.
After you've finished the instructions you can simply open the file headunit-desktop.pro with Qt Creator.
Most important: Use an OS with Qt 5.7.
Using an OS that serves packages with at least Qt 5.7 - for Ubuntu that's Ubuntu 17.04 [zesty] or newer will avoid so much trouble installing QtGstreamer you'll run into (I bet).
For more info, see this comment to an issue
Regarding Qt versions: I targeted Qt 5.7, because that's the version that will be included in the next release of Debian and is the version that comes with the latest Ubuntu version.
I gave up trying to get this project running on Ubuntu 16.04. I just installed a Ubuntu 17.04 for headunit-desktop and the instructions by @viktorgino just work.
For older instructions regarding 16.04 see this Revision of my instructions
- Qt Creator freezes after opening the project
I had this problem with the package version of Ubuntu 17.04 : Qt Creator 4.1.0.
Solution: Simply install and use the latest Qt Creator (currently 4.2.2) using the Qt Online Installeras at 05/2017