Unpredictable behaviour by QMediaPlayer when trying to mute the volume!

[faisal.tum]

for(int i = 0; i<videoPlaylist.size(); i++)
{
        videoPlayer->setMedia(QUrl::fromLocalFile(videoPlaylist.at(i)));
        videoPlayer->setMuted(true);
        videoPlayer->play();
        videoPlayer->setVolume(0);
        videoWidget->showFullScreen();
        while (videoPlayer->state() == QMediaPlayer::PlayingState)
        {
             QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
        }
}

So I have this for loop where I iterate through each QString from the QStringList and put the file name to the pointer to the object of QMediaPlayer as the media. Then I play the file as and try to mute the volume using two different attempts. Yet, in some videos there is no sound, while in others there is a sound. Why is such unpredictable nature? The videos are .mp4. Does it have to do anything with the codec? FYI, I tried to use setVolume() and setMuted() individually as well, but even then the unpredictability persists. The program is running on Ubuntu 14.04.

Thanks.

[asanka424]

This is happening to random videos or same videos for everytime?

Perhaps you can try this in a different OS (Windows may be) to see if this is a platform specific issue.