Extend Video is the Nodespell Creative Tool for continuing a clip you already have. You supply a source video and, optionally, a prompt for the new footage, and the model generates more of the shot before it, after it, or—on some models—at both ends. Most models return the whole extended clip, not only the new part.
When to use Extend Video
Section titled “When to use Extend Video”| You want to… | Use |
|---|---|
| Continue a shot past its last frame, or lead into its first | Extend Video |
| Change what happens inside the existing clip | Modify Video |
| Start a new shot from a still | Image to Video |
| Join separate clips one after another | Timeline |
Extend Video keeps the source’s framing and look as far as the model can. It does not guarantee that the original frames are preserved exactly.
Extend a clip
Section titled “Extend a clip”- Switch the workspace to Create. Select Image to Video in the tool rail, open the tool switcher at the top of the form, and choose Extend Video. It is also under All tools.
- Check the model. The default is Wan 3.0 Extend Video.
- Add the clip to Source video. Select the field to open Choose assets and pick an Asset or upload a file.
- Choose where new footage goes, if the model offers a direction setting.
- Set the length. On Wan 3.0 this is Total duration, the length of the whole result including the source.
- Optionally write a prompt for what happens in the new footage. On Wan 3.0 you can leave it blank for a natural continuation.
- Set Generations from 1 to 4, then select Extend.
Extend Video controls
Section titled “Extend Video controls”| Control | What it does | Options and defaults |
|---|---|---|
| Tool switcher (title) | Moves to another video Creative Tool | All video tools |
| Model picker | Chooses the extension model | Default: Wan 3.0 Extend Video |
| Previous model / Next model | Steps through the extension models | — |
| Source video field | The clip to continue; always required | One video |
| More settings | Less-used model settings | Collapsed |
| Generations | Number of runs submitted together | 1 to 4, default 1 |
| Extend | Adds or updates the model node and submits the runs | Shows the credit estimate |
Wan 3.0 Extend Video settings
Section titled “Wan 3.0 Extend Video settings”Wan 3.0 Extend Video is the default model. Wan 3.0 Prime Extend Video has the same controls and generates faster at a higher cost. The model describes itself as in preview, so results can vary between runs.
| Setting | What it does | Default |
|---|---|---|
| Source video | One MP4 or MOV clip, 1–15 seconds, at least 16 fps, at most 100 MB | Required |
| Prompt | Instructions for the new footage; blank gives a natural continuation | Empty |
| Extension Direction | Add to End, Add to Start or Both Ends | Add to End |
| Total duration | Length of the full output including the source, Auto or 2–30 seconds |
Auto |
| Resolution | 480p, 720p or 1080p | 720p |
| Reference images | Up to 10 ordered images, referred to as @Image1, @Image2 |
Optional |
| Reference audio | Up to 5 WAV or MP3 clips, 15 seconds combined at most, referred to as @Audio1 |
Optional |
| Generate Audio | Includes generated dialogue, music or sound effects | On |
| Enhance Prompt | Expands your prompt with extra detail | On |
| Seed, Watermark | Repeatability and a visible watermark | -1 (random), off |
Total duration must be longer than the source, and the source plus output cannot exceed 30 seconds. Auto needs a source shorter than 15 seconds.
Models for Extend Video
Section titled “Models for Extend Video”Extend Video has no featured list, so the picker opens on All models. The models are:
| Model | Direction | Length setting | Notes |
|---|---|---|---|
| Wan 3.0 Extend Video (default) | End, start or both | Total output, up to 30 s | Optional prompt, image and audio references |
| Wan 3.0 Prime Extend Video | End, start or both | Total output, up to 30 s | Same controls, faster |
| FLUX.3 Extend Video | After the source | Continuation, auto or 5–20 s |
Source MP4 under 50 MB and under 15 s; up to 1080p; prompt required |
| Grok Imagine Video Extension | After the source | Extension Duration, 2–10 s | Prompt required; returns the source and extension as one clip |
| Lightricks LTX 2.3 Extend Video | Start or end | Extension, up to 20 s | Optional prompt and context length |
The length setting means different things: on Wan 3.0 it is the total result, on the others it is the added footage. Longer source clips can raise the cost on models that bill for the whole stitched clip; check the estimate on Extend. See Plans and credits.
Where does the extended video go?
Section titled “Where does the extended video go?”Extend places the model node in the current graph level and runs it. The result appears in Results in the Create form and on the node; see Takes. Your source clip is not changed. Generated media also appears under Generated in the Asset Manager. To keep extending, use the new result as the next source.
Common problems
Section titled “Common problems”- “This value is required.” There is no source video, or the model requires a prompt.
- The run fails on Wan 3.0 with a duration error. Total duration is not longer than the source, or source plus output exceeds 30 seconds. Raise or lower Total duration, or trim the source.
- The source is rejected. It is outside the model’s limits for length, size, frame rate or format. Trim it in the Timeline and export again.
- The join is visible. Describe continuous motion in the prompt, keep the same lighting description, and try another generation.
Frequently asked questions
Section titled “Frequently asked questions”Does Extend Video return only the new footage?
Section titled “Does Extend Video return only the new footage?”On Wan 3.0 Extend Video and Grok Imagine Video Extension the result is the full extended clip, source included. Check the model description for others before cutting it into a sequence.
Can I add footage before the start of a clip?
Section titled “Can I add footage before the start of a clip?”Yes, with Wan 3.0 Extend Video or Wan 3.0 Prime Extend Video (Add to Start or Both Ends), or Lightricks LTX 2.3 Extend Video (start mode).
How long can an extended clip be?
Section titled “How long can an extended clip be?”On Wan 3.0 Extend Video the source plus output cannot exceed 30 seconds. Other models limit the added footage instead, for example 20 seconds on FLUX.3 Extend Video.
Is a prompt required?
Section titled “Is a prompt required?”Not on Wan 3.0 Extend Video, where a blank prompt gives a natural continuation. FLUX.3 Extend Video and Grok Imagine Video Extension require one.
Where did extension go in Modify Video?
Section titled “Where did extension go in Modify Video?”Extension models moved from Modify Video into Extend Video. Older drafts and canvas cards that used an extension model now open in Extend Video.
Related
Section titled “Related”- Extend a shot — a worked example
- Modify Video — change content inside a clip
- Image to Video — start a new shot from a still
- Timeline — trim sources and assemble extended shots
- Supported media — file types you can upload