Phonon Gstreamer backend in QGraphicsView

Martin Sandsmark sandsmark at
Wed Mar 3 15:04:06 GMT 2010

On Tuesday 2. March 2010 11.13.12 Andras Mantia wrote:
>  I try to use Phonon in QGraphicsView and it seems only the GStreamer
> backend can be used for this purpose (on Linux), with Xine all I get is
> a black frame.

Qt doesn't support XCB yet, which we need for thread safety in video widgets 
in Phonon (Phonon-GStreamer throws thread-safety out the window, apparently).

> Obviously I doubt that this should be always done, and there is similar
> code in glrenderer.cpp (which interestingly is not used even if I use a
> QGLWidget for graphicsview). Does anyone have an idea/hint how to detect
> when should the image be swapped?

Not really, sorry.

Martin T. Sandsmark

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