Pixelated QMovie on enabling High DPI Scaling

I'm using the example given here: https://code.qt.io/cgit/qt/qtbase.git/tree/examples/widgets/widgets/movie?h=5.15

For this project, if I enable High DPI scaling in main.cpp, the gif becomes pixelated.

This is the line in main.cpp, that I used to enable High DPI scaling:

QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

Please refer to the attached images:

PS: I also tried resizing the movie object (with high DPI scaling enabled), which also results in pixelation.

movie->setScaledSize(QSize(64, 32));