Seedance 2.5 Spicy Extend — Uncensored AI Video Extender

Keep the story going — extend a clip by up to 30 seconds.

Uncensored Seedance 2.5 (spicy) — video extension (requires at least one reference video; adds up to 30 more seconds). 4-30s (or smart auto) at 1080p with native audio and next-gen motion realism.

Reference to videoText + Image + Video + AudioVideo

Model Type:

Video ExtensionText to video Image to video Reference to video Video Editing

Input Parameters

Input

Output Result

Output

No output yet. Run the model to see results.

Click 'Run Model' to generate output

Pricing

Exact unit prices and billing rules for this model. All prices in USD.

Unit PricesUSD per second

Resolution	No reference video	With reference video-40%
480p	$0.1	$0.06
720p×2.25	$0.225	$0.135
1080p×5.53	$0.553	$0.3318

Billing Rules

Billable duration = total length of all reference videos + generated video length. Without reference videos, only the generated length is billed.
When duration is set to auto, the output is billed as 4 seconds.
For edit and extend runs, the generated length follows the source video.

Worked Example

720p · 6s reference + 8s output → (6+8) × $0.135/s

≈ $1.89

API examples

Endpoint

POSThttps://api.spicyrouter.ai/v1/videos

All requests require a Bearer API key.

Get API Key

Submit Task

curl -X POST \
  "https://api.spicyrouter.ai/v1/videos" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "seedance-2.5-spicy-extend",
  "audio_urls": [
    "https://example.com/audio.mp3"
  ],
  "duration": "4",
  "generate_audio": true,
  "image_urls": [
    "https://example.com/image.png"
  ],
  "prompt": "your prompt here",
  "resolution": "720p",
  "video_urls": [
    "https://example.com/video.mp4"
  ]
}'

Poll Status

# Replace TASK_ID with the data.task_id from the submit response
curl -X GET "https://api.spicyrouter.ai/v1/status/TASK_ID" \
  -H "Authorization: Bearer YOUR_API_KEY"

Request Parameters

Field	Required	Type	Values	Description
`audio_urls`	No	array		Reference Audios Optional reference audio giving the extended segment a timbre or soundtrack cue.
`duration`	No	enum	"-1", "4", "5", "6", "7", "8", "9", "10", … Default: `"4"`	Duration Extended segment length in seconds. Accepts -1 (auto, billed as 4s) or any integer 4-30; longer extension costs more.
`generate_audio`	No	boolean	Default: `true`	Generate Audio Generate native audio (dialogue, ambience, effects) synced to the video, or produce a silent clip when off. Pricing is per video second regardless of audio.
`image_urls`	No	array		Reference Images Optional reference images that give the extended segment a visual target (e.g. a new scene or character to introduce).
`prompt`	Yes	string	1 ~ 30000 chars Default: `""`	Prompt Describe what happens right after the reference video ends. The new segment appends to the source while keeping style and characters consistent.
`resolution`	No	enum	"480p", "720p", "1080p" Default: `"720p"`	Resolution Output resolution. 480p is the cheapest, 720p is balanced, 1080p is highest quality; each tier is billed at its own per-second rate.
`video_urls`	Yes	array		Reference Videos Required: one source video URL to extend. The generated segment appends to the end of the source; the video must be publicly accessible and its duration counts toward billing.

Capabilities

video_to_video

native_audio

nsfw