Nyaruko questions

• What is the delete sequence of QObject with default parent in Qt?
• Record incoming mjpeg stream?
• What is the number 0ui64?
• vs2013 compile for debug but not for release?
• How to auto restart a Qt application when it crashes, within the same program?
• What's the purpose of Q_INTERFACES macro?
• QNetworkAccessManager how to check whether there is pending request?
• How to use QPainter in QOpenGlWidget's paintGL
• QSettings clear, what does it do?
• QTimer not accurate at all?

Nyaruko answers