Facebook Page story API: media from an earlier post is rejected

Meta's Page Stories API lists a limitation: a photo or video uploaded for a story cannot have been used in a previously published post. So do not point a story at the file you already posted. Produce a separate story cut or still, and upload that.

The rule is Meta's, read 2026-10-01; the Sume steps come from the Video trim and Video frames docs.

What exactly does Meta say?

Under Limitations, the page says a photo or video uploaded for a story can not have been used in a previously published post, and that a video story can not exceed 60 seconds. Meta's page does not describe how the check works, so treat a re-encoded copy as a new file but test it on your Page.

How do I make a story variant from a feed video?

Run POST /v1/video-trim on the clip. The docs say it returns a **new** MP4 artifact holding only [start, end), with a new artf_ id and never the source. That is a different file from your feed upload.

How do I get a story photo from a clip?

POST /v1/video-frames extracts stills at times you name, as jpeg (default) or png. The docs mark it unbilled, and it needs the clip to be a media.sume.com artifact first, imported with POST /v1/media-imports. Keep the result under Meta's 10 MB photo cap.

What should I check before publishing?

Keep a record of which file went to a feed post and which to a story, and never reuse an id across both. Story ad sizes are in Instagram and Facebook Stories ad specs.