Hello,
I am Kanan Mo, Systems Engineer , BEng (NITK Karnataka) , I am experienced Qt/C++ developer, more than 10 years experience with Linux / Ubuntu.
I am familiar with Qt media processing , I have built the built the VLC library for C++/Qt (Android) , as this could best choice for content play out.
I have finished a bunch of other projects related audio/video processing , with QML filters ...etc.
Knowing more about your project , I can help you and let you know how to move on. We can chat on details before any action is taken .. take care.