Thanks to FrankOsterfeld. He pointed me in the right direction.
I had to copy the following files from Qt to my app dir:
Qt5.2.0\5.2.0\msvc2010_opengl\plugins\mediaservice\dsengined.dll
Qt5.2.0\5.2.0\msvc2010_opengl\plugins\mediaservice\qtmedia_audioengined.dll
Qt5.2.0\5.2.0\msvc2010_opengl\plugins\mediaservice\wmfengined.dll
Desination
MyAppDir\MyApp.exe
MyAppDir\(files from original post)
MyAppDir\mediaservice\dsengined.dll
MyAppDir\mediaservice\qtmedia_audioengined.dll
MyAppDir\mediaservice\wmfengined.dll
This links helped me to find the soloution:
- Deploying Qt application using QtMultimedia in release mode
- http://qt-project.org/doc/qt-5.0/qtdoc/deployment-windows.html#creating-the-application-package
"In contrast to user plugins, Qt plugins have to be put into subdirectories matching the plugin type. As we want to deploy the windows platform plugin it has to be put into a "platforms" subdirectory."