QML multiple VideoOutput throws error

ApplicationWindow {

VideoOutput

{ id: videoOuput1 source: mediaPlayer anchors: ... }

VideoOutput

{ id: videoOuput2 source: mediaPlayer anchors: ... }

MediaPlayer

{ id: mediaPlayer }

}

Having this setup throws this error:
bool __thiscall QDeclarativeVideoOutput::createBackend(class QMediaService *) Media service has neither renderer nor window control available.

It should be possible to have several video outputs right?

Plus, if I don't set the source of videoOutput2 initially, I can see it in videoOutput1, and with a click if I change the source of videoOutput1 to null and the source of videoOutput2 to mediaPlayer, I can still hear the audio, but nothing shows up.