Qt 6.2.2 QVideoFrame.toImage unsupported format or has no image.. just white color

using camera example.

If you connect

connect( ui->viewfinder->videoSink(), SIGNAL( videoFrameChanged( const QVideoFrame& ) ), &m_VidGrabber, SLOT( slotVideoFrameChanged( const QVideoFrame& ) ) );

then in slotVideoFrameChanged call frame.toImage you get error

W libcamera_arm64-v8a.so: QImage QVideoFrame::toImage() const : unsupported pixel format "Format_""SamplerExternalOES"

if instead you set your own video sink with

m_captureSession.setVideoSink(&m_VidGrabber);

then frame.toImage() seems to work but is always just full of white color and no image

II am trying to capture frames the video chat module in my application. everything seems to work fine in windows by setting my derived QVideoSink with m_captureSession.setVideoSink