@vicky_mac The old gstreamer versions have memory leaks. Which gstreamer version are you using? Try to upgrade to the latest gstreamer.
Your Qt is old as well. Upgrade your Qt to at least 5.15.2.
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Unsolved Play Video using Gstreamer and QML
QML and Qt Quick • • vicky_mac -
Solved AutoTest / QtTest: Any experience here?
C++ Gurus • • 6thC