← All models
H3 Max Extend Video adds a text-guided continuation to an existing video. It supports prompt expansion, adjustable duration and aspect ratio, and output resolutions from 480p to 2K, returning either the full extended video or only the new footage.
Example
Details
- Accepts
- text
Pricing
- Price
- 6.25 cr / second
Prices in credits (1 credit = $0.01).
Data schema
Input
| Field | Type | Description |
|---|---|---|
| seed | — | Seed for the continuation. Random when omitted. |
| output | stringenum: extended, continuation | 'extended' returns the whole source video followed by the new footage. 'continuation' returns only the generated continuation. |
| promptrequired | string | What happens next. Describe the continuation, not the source. |
| duration | integer | Seconds of new footage to add after the source. The actual duration may be slightly longer. |
| video_urlrequired | string | URL of the video to extend. Must be 1.625 s to 60 s long, up to 50 MB, aspect ratio between 0.4 and 2.5. |
| resolution | stringenum: 480P, 768P, 1080P, 2K | Output video resolution. |
| aspect_ratio | stringenum: auto, 21:9, 16:9, 4:3, 1:1, 3:4… | Output aspect ratio. 'auto' follows the source video. Other values crop the video to fit the selected ratio. |
| enable_safety_checker | boolean | Moderate the source video and the prompt. |
| enable_prompt_expansion | boolean | Automatically enhance the prompt using the source video to help keep the continuation consistent. May increase processing time. |
Output
| Field | Type | Description |
|---|---|---|
| seed | integer | Seed used for the continuation. |
| video | — | The extended video, or only the continuation per 'output'. |
| source | object | Source video information: width, height, frame rate, duration, and audio. |
| timings | object | |
| duration | number | Seconds of returned video. |
| expanded_prompt | — | The prompt used after expansion, or null when unchanged. |