How to Extract COVER ART from Audio Files ?

[BPit]

I am trying to extract some metaData from some Audio files.
Using Qt Quick, QML, i am able to use something like <metaData.author> and <metaData.title> to extract the author and title information. However, I cannot find a way to extract the cover Image.
I have the same program written in C++. and using < metaData->ThumbnailImage > i can extract and display the cover image of the audio file. However, in QML there is no ThumbnailImage option for MetaData. I tried coverArtUrlSmall , and coverArtUrlLong. but none would work.

Duplicate of https://forum.qt.io/topic/71764 -- @Wieland