Two photos in, one 10-second Omni transition out: $1.875 at 1080p
Gemini Omni first and last frame turns two stills into a transition. On Sume, image_url plus end_image_url for 10 seconds at 1080p costs $1.875.
Send the first photo as image_url and the second as end_image_url. Google's Omni 1.1 Flash lets you specify the starting and ending frames of a shot and generates continuous video between the two keyframes. On Sume a 10-second clip at 1080p is $1.875, and at 720p it is $1.25.
The request
Use POST /v1/video-router/generate with model: gemini-omni-flash-1.1, image_url, end_image_url, duration between 3 and 10, and a resolution. Sume routes the request by shape, so there is no separate endpoint for interpolation.
Do not send reference_*_urls alongside the frames. They are different modes, and Sume rejects the mix. Native audio is always on.
| Resolution | Per second | 10 s clip | 6 s clip |
|---|---|---|---|
| 360p | $0.0375 | $0.375 | $0.225 |
| 720p | $0.125 | $1.25 | $0.75 |
| 1080p | $0.1875 | $1.875 | $1.125 |
| 4K | $0.375 | $3.75 | $2.25 |
Where it helps
Before and after shots, a product at two angles and a location at two times of day all suit two keyframes. The model invents the in-between, so pick two images that share framing.
Match the aspect ratio of the images to the output; Omni takes 16:9 or 9:16 only.
What it does not do
The output is 3 to 10 seconds; for a longer run, chain clips by using the last frame of one as the first frame of the next. Check each pair before you pay for 4K, since the 360p price is a tenth of it.
Sources
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