Well that's the purpouse of this feature, filling in each link by hand with specific values. Managing automatically the og:image meta tag is not intended using my extension so that's not possible and out of scope. For this reason i pointed out to use a dedicated plugin such as http://extensions.joomla.org/extension/simple-facebook-meta that does this automatically.

But i think you are misunderstanding this issue from the beginning.

First of all it's not related i n any way to our component and to the sitemap. So you won't never solve this issue posting here of using the sitemap component.

Secondly, i'm of the opinion that you won't even solve it using the og:image meta tag. Your first post pointed out that you wanted to remove a link associated to the image in the Google News SERP. If so, you need to understand if it's possible and how it's possible to manipulate the way that Google builds Google News SERP.

As far as i know there are a lot of complex ways used by Google to do this and i ignore them.