QIODevice is not supported in symbian platform.

Class Member
void QMediaPlayer::setMedia ( const QMediaContent & media, QIODevice * stream = 0 )

Suggestion
Support QIODevice in symbian platform.

Reason
void S60MediaPlayerControl::setMedia(const QMediaContent &source, QIODevice *stream)
{
Q_UNUSED(stream)
...
}

Scenario
Play a video by streaming content.