Using Metal to rendering video frame with VideoOutput on macOS

[Dylan Deng]

I am using the VideoOutput component to render my own video frame data, but on macOS the GPU footprint is much higher than the native application.
I tried to use

QQuickWindow::setSceneGraphBackend(QSGRendererInterface::MetalRhi);

to set the rendering engine, but found that although the UI can be displayed, the video cannot be rendered properly.
Has anyone encountered a similar problem? Or what location class should I modify to use Metal to render video?