Thank you anda_skoa for your feedback. I put the cast in there because QtCreator was giving me a warning at one point. The init delay as well as 99% of this entire app is from "qmlvideofx" example from Qt/Examples. I removed both the cast and the delay and the issue persists. While I can't nail this down, I am thinking it has something to do with the compile/linker differences. I am examining the "Project" tab difference right now. I'm probably wrong, but it seems like the right direction.