Video tool · in your Oneirosea account
AI video extender
Make a video longer with AI. Oneirosea takes your clip’s exact last frame, or the clip itself, generates the next shot on the model you choose, and joins the clips into one video. Creating an account is free; each new clip uses credits, and you approve the price before it runs.
Two ways to extend a clip
From the last frame
Oneirosea takes the final frame of your clip, and the new clip opens on those exact pixels, so the cut does not show. 24 of the 26 video models can start from a frame.
From the motion
The whole clip goes to the model as a video reference, so the next shot keeps its timing and movement. Seedance 2.5, Seedance 2.0, MiniMax H3 and FLUX.3 Video read video references.
How to extend a video with AI
- Upload the video, an MP4, MOV or WebM up to 100 MB, or pick a clip you made in Oneirosea.
- Say what happens next: the action, the camera move, and how many seconds to add.
- Approve the model, settings and credit estimate. Nothing runs until you do.
- Keep the new clip, and extend again from its last frame as many times as the video needs.
- Oneirosea joins the kept clips, in order, into one video.
How long each extension can be
Each extension adds one clip, up to 30 seconds on the longest-running models. Extend again from the newest clip to keep going.
| Model | Each extension | Continues from |
|---|---|---|
| Seedance 2.5 | 4–30 seconds | Last frame or motion |
| Wan 3.0 | 2–30 seconds | Last frame |
| FLUX.3 Video | 5–20 seconds | Last frame or motion |
| Seedance 2.0 | 4–15 seconds | Last frame or motion |
| Seedance 2.0 Mini | 4–15 seconds | Last frame or motion |
| MiniMax H3 | 5–15 seconds | Last frame or motion |
| Kling 3.0 | 3–15 seconds | Last frame |
| Veo 3.1 | 4–8 seconds | Last frame |
How to keep the join invisible
- Continue from the extracted frame, never a redrawn one. A newly generated frame shifts faces, products and light; the real last frame cannot.
- Prompt what happens next, not the scene again. The frame already carries the scene.
- Keep the camera doing what it was doing at the cut. A push-in that turns into a pan reads as a new shot.
- Extend at the clip’s own aspect ratio and resolution. When clips are joined, each is scaled to the first clip’s resolution and frame rate.
- Choose the motion over the frame when movement matters more than the exact picture, like a dancer mid-step.
Common questions
Is the AI video extender free?
Creating an Oneirosea account is free, but extending is not: there are no free credits, and each new clip uses credits on the model you pick. You see the estimate and approve it before anything runs.
How much does it cost to extend a video?
One extension costs one clip on the model you choose, priced from what that model’s provider bills, plus 1 credit to take the last frame. Joining the clips costs 1 credit. Each model’s page lists what a clip starts at.
How long can I make a video?
Each extension adds one clip of up to 30 seconds, depending on the model, and you can extend again from the newest clip as many times as you like. The kept clips are joined into one video.
Can I extend a video I did not make with AI?
Yes. Upload any MP4, MOV or WebM up to 100 MB, such as a phone clip, a product shot or a screen recording, and extend it from its last frame.
How do I extend a Sora video?
Download the clip, upload it to Oneirosea, and continue it from its last frame on a model such as Seedance or Kling. The new clip opens on the Sora video’s exact final frame.
Will the new part match the original?
The cut will: the new clip opens on your video’s exact last frame. What follows comes from your prompt and the model, so describe the action that continues. With a video reference, the model also reads the clip’s motion.
Does the extended video keep its sound?
Each clip keeps its own sound when the clips are joined, and models that make sound, such as Seedance 2.5 and Kling 3.0, can generate it for the new clip. A clip without sound plays as silence.
Can I extend a video backward, before its first frame?
Yes, on models that take a last frame, such as Seedance and Kling. The new clip is generated to end on your video’s first frame and is placed before it.
Free tools for your clips
- Video frame extractorExtract the first, last or any frame from a video, or one every few seconds, as PNG or JPG. Free, no sign-up, and your video never leaves your browser.
- Video to PNG converterConvert MP4, MOV and WebM videos to lossless PNG images: the frame on screen, or one every few seconds in a ZIP. Free, no sign-up, nothing uploaded.
- Video to JPG converterConvert MP4, MOV and WebM videos to JPG images: the frame on screen, or one every few seconds in a ZIP. Free, no sign-up, and nothing is uploaded.