Here's what I'm trying to do : I have about 20 og:image in meta tags on one page, and on this page I have both a like button AND a share button (the deprecated one). I need all the 20 og:image for the share feature, and I want Facebook to pick a particular image when building the popup window (or "flyout"), which will also be the image displayed on a facebook wall after publishing.
Currently, the picture in the popup window is the first og:image, but when I publish and go on my facebook wall, facebook picked another picture to display (the 7th of the og:image list, to be more precise).
I got nearly the same problem on the share feature, I can't obtain the first og:image to be the first thumbnail of the available thumbnails list. The 7th image in og:image list is always the first thumbnail proposed.
Anyone knows the picking algorithm of Facebook or something? I've been searching everywhere and I can't find a single clue on this.
I tried to swap images but I have to avoid putting the same image twice (1st and 7th). I really need some help.
Thank you
I think it's supposed to be random - regardless, if you only want one image, just use one og:url tag