QtMultimedia - no service found for - "org.qt-project.qt.mediaplayer"

My setup is:

• Windows Vista 64bit
• Qt 5.1.0 for Windows 32-bit (VS 2010) Angle (qt-windows-opensource-5.1.0-msvc2010-x86-offline.exe)

Consider following trivial sample, run with the qmlscene program.

import QtQuick 2.0
import QtMultimedia 5.0

Video {
    width: 360
    height: 360
    source: "anyvideo.avi"
    autoPlay: true
}

No video appears. Following output is written to the console:

defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"

This is not a deployment issue. I fresh-installed the official opensource Qt 5.1.0 for Windows 32-bit (VS 2010) Angle build and I am running from the SDK bin directory. The SDK installed following files into the plugins/mediaservice directory:

• dsengine.dll (dsengined.dll)
• qtmedia_audioengine.dll (qtmedia_audioengined.dll)
• wmfengine.dll (wmfengined.dll)