Continue a clip
Seedance 2.0 extends from your footage or its last frame, carrying the action forward.
AI Video Extender
Continue a clip from its last frame on Seedance 2.0, then stitch the segments together.
How do I extend a video with AI?
Bring your clip into Renoise, then run it through Seedance 2.0 with extend (last-frame return): the model takes the final frame as its start and generates a new 4–15 second segment that continues the action. Repeat to add more segments, then stitch them on the Canvas Timeline into one longer video.
Starting from a single still rather than a clip? See the AI photo to video guide
Extend at a glance
4–15s per segment
Each generated segment runs 4–15 seconds; chain several to reach the length you need.
6 aspect ratios
Extend in 21:9, 16:9, 4:3, 1:1, 3:4, or 9:16 — matched to where the video runs.
Extend a video in 3 steps
How we recommend continuing an existing clip. Each pass adds one 4–15s segment; repeat to go longer.
Step 1Pick Seedance 2.0
Drop your clip into Canvas and select Seedance 2.0 from the model bar — it supports extend and last-frame return.
Step 2Set ratio & continue
Match the source aspect ratio (e.g. 9:16 for Shorts), then write a one-line prompt for what happens next.
- Step 3
Generate & stitch
Generate a 4–15s continuation from the last frame, then chain segments on the Canvas Timeline into one video.
Extending a clip
Original segment
Start from your first clip.
Continued tail
Generate the next segment from the last frame.
Stitch on the Timeline
Chain several continuations together.
Last-frame return
The seam stays continuous in pose and lighting.
Extending vs. upscaling: what an AI video extender actually does
These two get confused often, so it is worth separating them. Upscaling raises a video's resolution — it adds pixels to footage you already have, but no new time. Extending does the opposite: it adds new time. An AI video extender keeps the resolution as-is and generates fresh frames after your clip ends, continuing the motion, subject, and scene rather than sharpening them. If your goal is "make this video longer," extending is the job; if it is "make this video sharper," that is a different tool.
In Renoise, extending runs on Seedance 2.0's extend and last-frame return. The model reads the final frame of your clip — pose, lighting, camera position — and uses it as the opening frame of the next segment, so the seam between them stays continuous instead of cutting to an unrelated shot. You steer each pass with a one-line prompt for what should happen next.
One honest limit: each pass produces a 4–15 second segment, not an arbitrarily long video. To go beyond that you generate several continuations and stitch them on the Canvas Timeline. Continuity is strong frame-to-frame but not guaranteed — fine details can drift across a long chain, so review each seam as you build.
Choose your plan
One plan unlocks Seedance 2.0 and every model you extend with.
✓ Current Plan
Starter
$20/mo
Upgrade Plan1,200©/mo
$1.67 / 100©Generate up to 3,000 images or 150 videos every month.✓Watermark-free exports
✓20 FacePass Assets
✓Image Models
✓Video Models
✓ Current Plan
Standard
$60/mo
Upgrade Plan3,600©/mo
$1.67 / 100©Generate up to 9,000 images or 450 videos every month.✓Watermark-free exports
✓50 FacePass Assets
✓Latest Image Models
GPT Image 2 Nano Banana 2 Nano Banana Pro Midjourney V7
✓Latest Video Models
Seedance 2.0 HappyHorse 1.0
◈ Best Value✓ Current Plan
Advance
$200/mo
Upgrade Plan14,000©/mo
$1.43 / 100©Generate up to 35,000 images or 1,750 videos every month.✓Watermark-free exports
✓Unlimited FacePass Assets
✓Latest SOTA Image Models
GPT Image 2 Nano Banana 2 Nano Banana Pro Midjourney V7
✓Latest SOTA Video Models
Seedance 2.0 HappyHorse 1.0
Frequently asked questions
1.How do I make a video longer with AI?
Run your clip through Seedance 2.0 in Renoise using extend (last-frame return). The model continues from the final frame to generate a new 4–15 second segment. Repeat and stitch the segments on the Canvas Timeline to reach the length you want.
2.How long can an extended segment be?
Each generated segment is 4–15 seconds on Seedance 2.0. There is no single "infinite" pass — to go longer you chain multiple continuations and join them on the timeline, which is the standard workflow inside Renoise.
3.Does the extension match the original clip?
Last-frame return uses your clip's final frame as the next segment's start, so the seam stays continuous in pose, lighting, and framing. Continuity is strong frame-to-frame but not guaranteed — fine details can drift across a long chain, so review each seam.
4.Can Renoise upscale a video to 4K?
No. Renoise extends videos — it adds new time, not resolution. An extender continues your footage; it does not upscale it. Seedance 2.0 outputs at 720p or 1080p, and 4K applies to image models, not video.
5.What aspect ratios can I extend in?
Seedance 2.0 supports 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16. Match the source clip's ratio when you extend — for example 9:16 for TikTok or Shorts, 16:9 for YouTube — so the continuation frames the same way.
6.Can I extend a video that has a real person in it?
Video models block reference media with a real human face. If your clip shows a real person you hold rights to, clear their likeness through FacePass first; then you can continue the clip with that cleared face referenced across segments.
7.Do I need a separate tool to join the segments?
No. After generating your continuations, drop them on the Canvas Timeline and stitch them in order — Renoise handles both the extension and the assembly in one place, then exports a single video.
By Peyton, RenoiseLast reviewed Models verified: Seedance 2.0