Midjourney video length: reported 5-21 s, and Sume's ranges

Midjourney video clips are reported at 5 to 21 seconds. That figure comes from a search result for Midjourney's docs, summarized in Releasebot's Midjourney feed (read 2026-10-02); I could not open the primary page, so treat it as reported.

Sume does not list a Midjourney model in the docs I read, so you cannot get Midjourney clips through Sume. What Sume offers instead is a catalog of video models, each with its own duration range, which you read from GET /v1/videos/models.

What durations do Sume's video models accept?

The ranges differ by model and by route, so read supported_durations before you pin a length. These are the figures stated in the Video docs.

How do I ask for a length?

Send duration as whole seconds on POST /v1/videos; the value is validated against the model. A model that does not list your value rejects the request, so check the descriptor first.

What should I do if I need a long clip?

Pick a model whose range covers it, or generate shorter clips and join them. For a first frame you already have, frame_images with frame_type: "first_frame" makes image-to-video, on models that list it in supported_frame_images. The Video generation docs have the request fields.