Media per post
A Post with one video uses the
reel placement automatically. A Post with images uses the feed placement.
Reel video limits
Facebook placement is automatic. Do not send a
facebook member in
destination_options.Image limits
Facebook can make a PNG above 1 MB look pixelated. OpenPMM gives advice for
this, but it does not block the post.
Facebook documents no dimension limit and no aspect ratio limit for an image.
Facebook makes an image smaller itself and removes the location metadata.
Use a JPEG, PNG, or GIF image that is no larger than 4 MB.