For some of my og: meta tags, I'm using images that are much taller than they are wide - 1920px tall by 1280px wide. This results in a small thumbnail rather than an image that spans the full card.
Other than cropping the photo to a 1.91 to 1 ratio, is there anything I can do to force Facebook Debugger to "auto-crop" this image so that it utilizes the full card space? Would og:image:width and og:image:height be able to help, or anything else? Or is cropping the only option here?
Cropping is the only option.
og:image:widthandog:image:heightare only used to tell the scraper about the actual dimensions of the image, so that in the context of a first share the preview for the user can be rendered more quickly; they can not be used to resize or crop the image.