Extend Video — AI Video Extender
Continue a clip with the FLUX.3 video extension tool. The source-video workflow is selected so you can upload footage and describe what happens next.
Source video*Required
Guide the result with reference images, videos, or audio.
Enter at least 3 characters to continue.
What you can create with Extend Video
Write the next action as a continuation of the source, keeping the subject, camera direction and scene consistent. This workflow uses video input; a still first frame belongs in image-to-video.
When to use this tool
Extend Video is useful when a source clip ends before an action is complete and you want to describe what the subject or camera should do next.
FLUX.3 extension requires one source video and offers a selected output duration of 5–20 seconds at 720P or 1080P. Use Image to Video for a still starting frame, or Recast for replacing a person within the existing action.
A prompt to adapt
Continue the walk along the pier as the person reaches the railing and turns toward the ocean; maintain the same tracking direction.
Tool specifications
- Model
- FLUX 3
- Workflow
- Reference to Video
- Output resolution
- 720P / 1080P
- Video duration
- 5–20 seconds
- Source video
- Required; maximum files: 1
How to use Extend Video
- 01
Prepare your brief
Describe the intended result and add the files required by the selected workflow.
- 02
Choose and review settings
The matching model or Agent is already selected. Review its settings, inputs and credit estimate.
- 03
Generate and review
Sign in to submit the task, follow its progress and review the output or storyboard in your workspace.
Check the quote before generating
The live estimate depends on the model, settings and input materials. Sign in and use generation credits to submit a task; review the quote in the tool before you start.
Extension credits are based on the requested duration of the new FLUX.3 output. Review that duration and the current quote before submitting the source clip.
View plans and creditsQuestions about this tool
Is extending a video the same as Recast?
No. FLUX.3 extension continues an existing clip. MiniMax H3 Recast replaces a person within source footage while retaining the original motion and audio.
Do I need an account?
You can explore the tool and its settings on this page. Sign in to upload task materials, submit generation requests and save results to your workspace.
How are generation credits calculated?
Credits depend on the selected model, duration, resolution and input materials. Review the current estimate before submitting. Agent projects may include several generation tasks, each with its own credit usage. Extension credits are based on the requested duration of the new FLUX.3 output. Review that duration and the current quote before submitting the source clip.
Where can I find and download my results?
Completed results are available in your workspace. Open the task to preview or download its files. For an Agent project, review the storyboard and the assembled video in the project.