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PixVerse Extend Fast

Integrate

Model id pixverse/extend/fast
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/pixverse/extend/fast?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"

Files like the example: $0.40 400 API credits your files are measured before the run Run it on this page

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PixVerse · Video

Your first result goes here

Build a request below and run it with your API key. Outputs are copied to our storage, kept forever or 7 days for free.

Build a request

Controls are generated from the model schema. The code and the price update as you change them.

•required

Prompt specifying the desired video extension.

•required video_url
Drop a file, or

URL pointing to the video being extended.

resolution default 720p

Output resolution selection, with 1080p excluded when Fast mode is active.

Advanced negative_prompt · style · model · seed · generate_audio
default

Negative prompt applied during generation.

style

Visual style for the video extension.

model default v4.5

Model version used for generation.

Seed controlling randomness during generation.

POST /run/pixverse/extend/fast?wait=20 quote → $0.40
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/pixverse/extend/fast?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"

Run this request

Your key stays in this browser: it is sent only to the Doitong API and saved (localStorage) only if you tick Remember. Get an API key

About PixVerse Extend Fast

A quicker variant of the video extension tool. It continues the clip at `video_url` following your `prompt`, with `negative_prompt`, `style` and `seed` available. Resolution is limited to 360p, 540p or 720p, as 1080p is not supported, and there is no `duration` input. The `model` field selects a version from v3.5 to v6, and audio generation is available on v5.6 and newer.

Parameters

Send either the canonical name or the native name, not both. Canonical names

NameType DefaultAllowed Description
video_urlrequired video
Typeurl · video
URL pointing to the video being extended.
promptrequired
Typestring
Prompt specifying the desired video extension.
negative_promptoptional
Typestring
Default
Negative prompt applied during generation.
styleoptional
Typeenum
anime3d_animationclaycomiccyberpunk
Visual style for the video extension.
resolutionoptional
Typeenum
Default720p
360p540p720p
Output resolution selection, with 1080p excluded when Fast mode is active.
modeloptional
Typeenum
Defaultv4.5
v3.5v4v4.5v5v5.5v5.6v6
Model version used for generation.
seedoptional
Typeinteger | null
Seed controlling randomness during generation.
generate_audio_switchoptional generate_audio
Typeboolean
Defaultfalse
Audio generation toggle for background music, sound effects, and dialogue. Available on models v5.6 and later.
required Canonical name, also accepted

File parameters take a public https:// URL, a data: URI up to 10 MB, or the file_url of an upload. Files

Output

GET /requests/req_8k2m4q7x1z9c3v5b6n0p2r4t
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "pixverse/extend/fast",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 400,
    "usd": "0.40",
    "charged": 400,
    "refunded": 0
  },
  "input": {
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
Your files, your choiceEvery outputs[].url is a copy on our storage: kept forever (paid per GB-month) or 7 days for free, by your account setting or ?storage=.
Same shape on every modeltype, url, content_type, width, height and duration, for images, video and audio alike. output is the model’s own result object.
Fields of output
video
object {url, content_type, file_name, file_size}Video produced by extending the input.

More models: Video to Video

For AI agents: this page as Markdown is at https://doitong.com/developers/models/pixverse/extend/fast.md. All models and guides: https://doitong.com/developers/llms.txt