Seedance 2.5 video extension
Upload a video, describe what should happen immediately after the final frame, and generate a new continuation with Seedance 2.5. The workspace keeps the source aspect ratio, estimates the required credits, and lets you review the completed extension from the same page.
Source video to extend
Upload one MP4 or MOV source video, or provide a direct video URL. Use only media you have the right to process.
Online video continuation workflow
An AI video extender uses the final part of your source clip as visual context. Instead of creating a disconnected shot, it generates the next beat after the existing ending. The strongest results come from a clean final frame, one understandable next action, and a short list of continuity details that truly need to stay fixed.
Choose one MP4 or MOV video with a readable ending. The last seconds should clearly show the main subject, movement direction, camera angle, lighting, and environment that the continuation must inherit.
Write what happens immediately after the source ends. Name the next action, the camera movement, the desired endpoint, and only the identity, object, lighting, or audio details that must remain stable.
Sign in to calculate the credit reservation from the uploaded video and chosen settings. After generation, watch the original ending and new opening together and inspect the transition before publishing.
The workspace is designed for continuation, not full-clip restyling. If you want to replace an object, change a background, or alter material inside the existing duration, use the AI video editing page instead.
Video extension prompt guide
A continuation prompt should move forward from what is already visible. Avoid reintroducing the whole scene or requesting several unrelated changes at once. Keep the instruction chronological and give the shot a clear finishing point.
Practical prompt formula
Next action + camera behavior + end state + continuity anchors + audio direction. Example: Continue as the runner rounds the corner, keep the side-tracking camera at the same speed, finish on the open plaza, preserve the red jacket and overcast light, and maintain the city ambience.
Continue the product shot as the camera finishes a slow clockwise orbit and settles on a centered front view. Keep the same bottle shape, label placement, black stone surface, soft side light, shallow depth of field, and quiet studio ambience.
Useful when the source already establishes the product and you need one more controlled reveal, hold, or closing angle without changing the visual setup.
Continue from the final frame: the woman closes the notebook, stands, and walks toward the window. Preserve her face, hairstyle, green sweater, desk layout, morning light direction, eye-level lens, and subtle room tone.
Keep identity details concise and give the character one sequential action. This is easier to maintain than combining a wardrobe change, location change, and new camera style.
Extend the shot as the camera keeps gliding forward at the same speed, passes through the doorway, and gently tilts up to reveal the atrium ceiling. Preserve the lens perspective, warm interior light, straight horizon, and footsteps in the space.
Use this pattern when the motion path is the main continuity anchor. State speed, direction, and the final composition so the camera does not reset unexpectedly.
Continue the scene as the train arrives, the waiting traveler lifts the suitcase handle, and the doors open. End before the traveler boards. Keep the same platform, blue coat, evening rain, locked camera position, station announcements, and reflected light.
A defined stopping point prevents a short extension from attempting an entire second scene. It works well for transitions, reveals, and clean edit points.
Review the source ending before you generate, then compare the join after the result is ready. Continuity is not only visual; timing, sound, and camera behavior can reveal an abrupt transition even when the first generated frame looks plausible.
Check face shape, hairstyle, clothing, accessories, body proportions, and any product geometry that must persist across the transition.
Confirm that people, vehicles, fabric, particles, and background movement continue in the same direction and do not jump in speed.
Compare lens perspective, camera height, horizon, shot scale, movement speed, and stabilization between the source ending and generated opening.
Look for sudden changes in shadow direction, exposure, weather, time of day, reflections, architecture, or object placement.
Listen for changes in room tone, music level, speech timing, environmental sound, and background noise at the exact transition point.
Play several seconds before and after the join, then inspect frame by frame for duplicated frames, warping, flicker, frozen motion, or visible text changes.
Video extension works best when the original clip already contains the look you want and only needs another action, reveal, reaction, or transition. These workflows benefit from continuation more than from generating a separate clip from scratch.
Add a final reaction, product hold, CTA beat, or transition while preserving the pacing and visual language of a short-form source video.
Continue an orbit, reveal another feature, complete a hand interaction, or create a cleaner endpoint from an existing product shot.
Carry a character action into the next beat, reveal new information, or end at a deliberate edit point without rebuilding the established location.
Continue a drone move, walking shot, road sequence, or scenic reveal while maintaining weather, terrain, direction, and camera speed.
Extend a gesture, dance phrase, instrument movement, or stage reveal, then check rhythm and performer identity closely at the join.
Create extra handles around a shot, complete a pan or tilt, or reach a calmer composition that gives an editor more room to cut.
AI continuation is a generative result, not a lossless copy of the source. Treat every output as a draft that needs factual, visual, audio, and rights review before commercial use.
This is an independent third-party service. It is not affiliated with, endorsed by, or operated by ByteDance, Seedance, Dreamina, or CapCut.
Choose the tool that matches the source material and the change you need. These pages are also useful next steps when extension is not the right operation.
The external model page provides first-party background on Seedance 2.5 capabilities. Service availability, accepted inputs, settings, credit estimates, and completed outputs are determined by this site's connected provider workflow.
Use a clean source clip, choose one next action, and keep only the continuity details that matter. The dedicated workspace above is ready for the source video and prompt.
Open the AI video extender