placement in
destination_options.instagram. Read Media guidelines for
the general rules.
Media per post
A post and a Story accept an image. A Reel accepts a video.
Video limits
Instagram recommends a 9:16 vertical video. OpenPMM gives advice for a different aspect ratio, but it does not block the post.
Image limits
OpenPMM converts a PNG or a WebP image to JPEG for you, and makes the file
smaller when it is above 8 MB. See Media compatibility.
An aspect ratio outside the 4:5 to 1.91:1 range needs a crop or a pad. OpenPMM
does not do this for you, because it changes what the image shows. Use another
file, or remove the destination.
A Story has no aspect ratio limit. Instagram recommends 9:16 to prevent a crop
or a blank space.
Instagram crops every image in a carousel to match the first image. The default
is 1:1.