Qml Video not GPU accelerated on Raspberry Pi CM4

[Farias]

Hello,

It's my first time posting here, I have trouble getting video playback, with gpu acceleration, on the Raspberry Pi CM4, (Raspberry Pi OS 32bits Bookworm).
The video plays fine, but with 200% cpu usage !
If i play same video (1080p 30fps h264 mp4 file) on vlc i get down to 20% cpu usage.
I am using Qt5.15, with eglfs plugin and Video qml type.

There is possible to get video hardware accelerated on the Pi with Qt?

Thanks !

[JoeCFD]

@Farias I guess Qt5 uses gstreamer and might have only a playbin in it. It may not handle hardware acceleration. Maybe try Qt6 for luck. Or write your own pipeline to make HW acceleration.