unable to play gstreamer in QWidget

[rob_ewbank]

1. put gst_init in your main.cpp.

2. You definitely have a memory leak when pipeline goes out of scope, store
it as a member variable.

3. You should not create the widget in a function like you have. Make it in
the parent classes constructor.

When you create a widget, you must either add it to a layout or provide a
parent in its construction. If it is inside another widget or MainWindow,
pass "this" in as an argument.



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