Real estate twilight sky swap with Omni Flash edit: price

To turn a daytime listing walk-through into a twilight one, call the Video Router with gemini-omni-flash-1.1, a video_url and a prompt such as "Change the sky to a warm sunset and switch on the interior lights. Keep everything else the same." Resolution is optional and defaults to 720p. A 5-second source costs $0.63 at 720p and $0.94 at 1080p. Source: Video Router, read 2026-10-06.

Edit mode takes no aspect_ratio, and a duration, if you send one, is only a hint for the reserve estimate. The output keeps the source's framing.

What does an edit cost?

Five seconds of source, billed per output second.

What does the request look like?

The edit goes to the Video Router, with video_url as the source, not a reference.

curl -sS -X POST https://api.sume.com/v1/video-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: twilight-edit-001" \
  -d '{
    "model": "gemini-omni-flash-1.1",
    "prompt": "Change the sky to a warm sunset and switch on the interior lights. Keep everything else the same.",
    "video_url": "https://example.com/listing-walkthrough.mp4",
    "resolution": "720p",
    "mode": "async"
  }'

What should I watch for?

You cannot send video_url together with image_url, end_image_url or reference lists. Check that the edit does not change the rooms themselves, since a listing clip must stay true to the property.