1-minute AI video generator: two 30-second clips and a join
No single video request makes 60 seconds. Make two 30-second seedance-2.5 clips and join them with Timeline 1.0 at $0.10 per output minute. Costs and steps.
The longest single request in Sume's video catalog is 30 seconds, so a one-minute video is two 30-second clips joined with Timeline 1.0. Two seedance-2.5 clips at 720p reserve about $34.68 in total, and the Timeline render adds $0.10 per output minute, rounded up.
What does a one-minute video cost?
Two clips at 30 seconds each, 16:9, plus one Timeline minute.
| Resolution | Two 30 s clips | Timeline (1 min) |
|---|---|---|
| 480p | $16.14 | $0.10 |
| 720p | $34.68 | $0.10 |
| 1080p | $85.30 | $0.10 |
How do I make the two clips?
Write two connected scene prompts and send each as its own request. For the second, use a last frame of the first as first_frame so the join looks continuous; the steps are in extend an AI video past 30 seconds.
How do I join them?
Timeline 1.0 takes Sume-hosted media.sume.com media, so import generated files first with POST /v1/media-imports. It requires an Idempotency-Key, offers transitions such as dissolve and fade, and has an unbilled /plan preflight. It also needs an audio spine: send audio.duration_seconds of 60, with either a voice or music file or audio.mode set to silence. Details in the Timeline docs.
How can I lower the cost of a minute?
Yes: pick a lower resolution for review passes, or loop a shorter clip; see increase video length by looping. Each choice trades visual variety for cost.
Sources
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