X Ai Grok Imagine Video Video Extend
Playground
Try it on WavespeedAI!X-AI Grok Imagine Video Extend turns short clips into longer videos with smooth motion continuity and natural scene extension. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.
Features
Grok Imagine Video Extend
Grok Imagine Video Extend is X-AI’s video extension model that seamlessly extends existing videos by generating additional frames. Upload a video clip and describe the continuation — the model generates smooth, coherent footage that naturally extends your original content by 6 or 10 seconds.
Why Choose This?
-
Seamless extension Generates new frames that naturally continue the motion and style of your original video.
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Flexible duration Extend videos by 6 or 10 seconds based on your needs.
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Prompt-guided generation Describe how the video should continue for precise control over the extension.
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Automatic concatenation The extended footage is automatically merged with the original video for a seamless result.
Parameters
| Parameter | Required | Description |
|---|---|---|
| video | Yes | Source video to extend (URL or upload). |
| prompt | Yes | Describe how the video should continue. |
| duration | No | Extension length: 6 (default) or 10 seconds. |
How to Use
- Upload your video — provide the source video you want to extend.
- Write your prompt — describe how the video should continue (motion, action, scene changes).
- Set duration — choose 6 or 10 seconds of extension.
- Run — submit and download your extended video.
Pricing
| Duration | Cost |
|---|---|
| 6s | $0.30 |
| 10s | $0.50 |
Billing Rules
- Rate: $0.05 per second
- Duration options: 6 or 10 seconds
- Billing is based on the selected duration, not actual playback length
Best Use Cases
- Content Extension — Extend short clips into longer sequences for storytelling.
- Social Media — Transform brief moments into full-length videos for TikTok, Reels, or Shorts.
- Film & Production — Extend establishing shots or B-roll footage.
- Looping Content — Create extended versions of clips for backgrounds or displays.
- Creative Projects — Continue scenes beyond their original capture.
Pro Tips
- Use detailed prompts describing how the motion, camera, and scene should continue.
- For best results, use source videos with clear motion direction that can be naturally continued.
- Start with a 6-second extension to test your prompt before committing to 10 seconds.
- Describe both motion and atmosphere in your prompt for richer results.
Notes
- Both video and prompt are required fields.
- Extension duration options: 6 or 10 seconds.
- Ensure uploaded video URLs are publicly accessible.
- The output includes the original video with the extension appended.
Related Models
- Grok Imagine Video Image-to-Video — Generate video from a still image.
- Grok Imagine Video Reference-to-Video — Generate video from multiple reference images.
- Grok Imagine Video Edit — Edit existing videos with text instructions.
Authentication
For authentication details, please refer to the Authentication Guide.
API Endpoints
Submit Task & Query Result
# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/x-ai/grok-imagine-video/video-extend" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
"duration": 6
}'
# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"
Parameters
Task Submission Parameters
Request Parameters
| Parameter | Type | Required | Default | Range | Description |
|---|---|---|---|---|---|
| video | string | Yes | - | URL of the input video to extend. | |
| prompt | string | Yes | - | Text description of how the video should continue. | |
| duration | integer | No | 6 | 6, 10 | Duration of the extension in seconds. |
Response Parameters
| Parameter | Type | Description |
|---|---|---|
| code | integer | HTTP status code (e.g., 200 for success) |
| message | string | Status message (e.g., “success”) |
| data.id | string | Unique identifier for the prediction, Task Id |
| data.model | string | Model ID used for the prediction |
| data.outputs | array | Array of URLs to the generated content (empty when status is not completed) |
| data.urls | object | Object containing related API endpoints |
| data.urls.get | string | URL to retrieve the prediction result |
| data.has_nsfw_contents | array | Array of boolean values indicating NSFW detection for each output |
| data.status | string | Status of the task: created, processing, completed, or failed |
| data.created_at | string | ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”) |
| data.error | string | Error message (empty if no error occurred) |
| data.timings | object | Object containing timing details |
| data.timings.inference | integer | Inference time in milliseconds |
Result Request Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
| id | string | Yes | - | Task ID |
Result Response Parameters
| Parameter | Type | Description |
|---|---|---|
| code | integer | HTTP status code (e.g., 200 for success) |
| message | string | Status message (e.g., “success”) |
| data | object | The prediction data object containing all details |
| data.id | string | Unique identifier for the prediction, the ID of the prediction to get |
| data.model | string | Model ID used for the prediction |
| data.outputs | string | Array of URLs to the generated content. |
| data.urls | object | Object containing related API endpoints |
| data.urls.get | string | URL to retrieve the prediction result |
| data.status | string | Status of the task: created, processing, completed, or failed |
| data.created_at | string | ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”) |
| data.error | string | Error message (empty if no error occurred) |
| data.timings | object | Object containing timing details |
| data.timings.inference | integer | Inference time in milliseconds |