QML MediaPlayer shows gstreamer pipeline in second window

[samup]

Re: QMediaPlayer Video Opens Second Window. Only One Desired. GStreamer Pipeline URI

Hello, I'm using MediaPlayer and VideoOuput component to visualize a gstreamer pipeline. The relevant part of my QML code is the following:

MediaPlayer{
    id: playVideo
    videoOutput: videoOutput
    source: backend.CurrentPipeline
}

VideoOutput{
    id: videoOutput
}

When I use as source a gstreamer pipeline with qtvideosink, the stream is correctly visualized in the application window. If, instead, I use another sink, like for example xvimagesink, another window pops up with the pipeline stream.

This happens also if I set the sink name property to "qtvideosink". How can I avoid this and visualize the pipeline stream inside the videooutput component also with other sinks apart from qtvideosink?

Thank you very much