/v1/videos size returns 400: send resolution and aspect_ratio

Sending size such as "1280x720" to POST /v1/videos returns 400 unsupported_parameter on Sume. Every v1 video model reports supported_sizes as null, so the field has no allowed value. Send resolution (for example 720p) and aspect_ratio (for example 16:9) instead.

Why

The Videos docs list this under the differences from OpenRouter. OpenRouter accepts size when a model shows supported_sizes; Sume models do not show it. A client copied from another video API that sets size will fail on its first call, which is a cheap failure because the request is rejected before a job starts.

Read the model row first

GET /v1/videos/models gives each model the lists you need. Pick values from those lists, because limits differ by model.

Example

A request that follows the row for seedance-2, whose sample row lists 480p, 720p and 1080p.

curl -X POST https://api.sume.com/v1/videos \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2",
    "prompt": "A paper boat drifting down a rainy street",
    "resolution": "720p",
    "aspect_ratio": "9:16",
    "duration": 5
  }'