[Qt-interest] Problems deleting Phonon::MediaObject

[Claus Tøndering]

I have a problem with Phonon in Qt 4.4.3 under Windows Vista.

 

In an application I create a VideoWidget, an AudioOutput and a MediaObject.
I connect everything with appropriate paths and call play() on the
MediaObject.

 

Everything works beautifully so far.

 

Several seconds after the video has finished playing, I disconnect the
paths, and delete the MediaObject.

 

Normally, this also works fine, but occasionally I get this error message
when trying to delete the MediaObject:

 

    ASSERT: "!isEmpty()" in file
c:\qt\4.4.3\include\qtcore\../../src/corelib/tools/qlist.h, line 246

 

The reference is to the following function in the QList<T> class:

 

    inline T& first() { Q_ASSERT(!isEmpty()); return *begin(); }

 

Since the behaviour varies, my guess is that this has something to do with
threads; however, the objects are created and deleted in the same thread.

 

Any ideas what the problem might be?

 

--

Claus Tondering

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