If you want a thumbnail for an image, you have to give an image: url to qml.
See https://developer.ubuntu.com/en/apps/qml/tutorials/use-ubuntu-thumbnailer/
If you want a thumbnail for an image, you have to give an image: url to qml.
See https:/ /developer. ubuntu. com/en/ apps/qml/ tutorials/ use-ubuntu- thumbnailer/