✦A cinematic character walks through a neon city in the rain...The camera follows the character as the lights begin to glow...
01
Keep the take from the source video, then ask for +5s
只要输入故事内容或几个关键字，Joi AI SI 就能帮助你快速搭建动态画面，适合短片、动画和电影感场景。
Joi AI SIJoi AI SI
把故事、脚本和镜头想法变成动态画面。Joi AI SI 支持从文字开始探索不同风格与节奏，并在同一工作台中继续调整。
Illustrative city motion
Illustrative close-up texture
Illustrative character moment
A paragraph alone will not open this video extend path. Start with a source clip that already holds the take you want to continue, then generate about 5 more seconds. The clips below reuse the text-to-video template media; they are illustrative, not verified video extend outputs.
Start from the uploaded source video
你不需要一开始就写出完整分镜。Joi AI SI 会把提示词变成可观察的动态草稿，方便你继续修改主体、动作、镜头和节奏。
Keep the uploaded source video, the continuation prompt, and Seedance 2.0 in one loop. Do not treat this as a blank-page text-to-video generator or a lossless stitcher.
只要输入故事内容或几个关键字，Joi AI SI 就能帮助你快速搭建动态画面，适合短片、动画和电影感场景。
Stay in this video extend workbench from upload to History. Seedance 2.0 is the default. Read the displayed credit cost before you generate again.
Name what must continue and what must not change. This page does not open a generic text-to-video catalog. Availability follows the video extend selector on Seedance 2.0.
无需安装额外软件，打开 Joi AI SI 工作台即可输入提示词、查看灵感并管理生成历史。
Use this path when a source clip already exists and you need about 5 more seconds of the same take. It is not a substitute for a generic text-to-video page, and it does not promise a longer target than the +5s badge.
When the take already exists on video, a short continuation note is enough to test about 5 more seconds. A script without a source clip belongs on another workflow.
A catalog clip can take about 5 more seconds of the same orbit. Compare the silhouette to the source after every run.
Use a locked source clip to preview the next 5 seconds before you commit to a longer shoot. The template clips are not dailies from this workbench.
Generate a few video extend versions from the same source clip, then pick a rhythm. Extra takes still spend the credits shown for that run.
A clear source clip can take about 5 more seconds of the same pan. Keep labels readable, and do not ask the page to invent a lecture from text alone.
Workbench notes
Write the keep-and-continue notes first, generate about 5 more seconds, then use the draft to correct the next prompt. The cards below show common work habits. They are not reviews of named users, and they are not proof of a specific extend clip.
He Yuxuan
E-commerce advertising operator
“I keep one product take, write a short continuation note, generate a few +5s drafts, and pick the one whose rhythm fits the listing.”
Gu Zhiyuan
Short-form video creator
“One source clip gets me about 5 more seconds faster than starting from a blank timeline, as long as I keep the take honest.”
Li Peishan
YouTube creator
“I reuse the same source video and only change continuation language, which makes the next +5s take easier to compare.”
Xu Ruizhe
Student creator
“I test one continuation at a time from the same source clip instead of asking the page to invent a new scene.”
He Zhiyu
Founder
“A source clip plus a continuation note is a faster promo draft than splicing extra seconds by hand.”
Wu Zhiqing
Instructor
“A process clip can take about 5 more seconds so a step is easier to show. That is a workflow note, not a classroom result claim.”
Common questions about this AI video extender path.
On Joi AI SI it is a video-to-video continuation path, not a text-to-video engine. You upload a source video, describe how the motion should continue, and generate about 5 more seconds on the locked video extend workbench with Seedance 2.0. It is not a lossless splice onto the original file. Current model and service rules still apply.
Wait time follows the +5s target, resolution, and the current queue. After you submit, watch History for status, then preview or download when the task finishes.
The source video already holds the take. Keep identities and camera height, name the next motion, and avoid asking for a new venue the clip never showed. If the keep list drifted, simplify the next +5s run instead of stacking adjectives.
Yes. Keep the same source video, change one continuation note, and generate again. Compare versions in History. A new source clip is only needed when the original take is wrong.
You can open the workbench and inspect the locked video extend tab. Available output follows your account, and the credit cost for this +5s run is shown before you submit.
请根据所选模型的服务条款、输入素材授权和你的账户方案确认使用范围。Joi AI SI 页面不会替你承诺第三方模型的商业许可。
Three steps from a source video to a +5s continuation
Keep the source video, the continuation prompt, and the credit preview in one workbench instead of bouncing between a timeline splice and a separate generator.
| Feature comparison | Joi AI SI 文字生成视频 | A generic editor |
|---|---|---|
| Ease of use | Upload a source video and a continuation prompt in one workbench | Scenes and splicing must be built on a timeline |
| Visual variety | Continuation from the take already in the source video, on this AI video extender | Fewer looks unless you change the source clip |
| Prompt reading | Reads keep / continue / camera notes against the uploaded source video | Keyword matching with little use of the source clip |
| Templates and effects | Prompt-led +5s continuation from the upload; no extra template pack is promised | Fewer reusable looks after a first export |
| What this page covers | Video extend from a source clip on the locked video extend workbench | A generic editor that is not built for this path |
| Customization | Change continuation notes or resolution, then generate the +5s run again | Little room to iterate after the first export |
| Generation time | Cloud generation; wait time follows the +5s target and queue | Slower and dependent on local hardware |
| Output | Output follows Seedance 2.0 and the selected resolution on this video extend workbench. It is not a lossless splice. | Quality and watermarks depend on the other tool’s plan |
| Use cases | Source-video continuations you are authorized to extend by about 5 seconds | Usually limited to one editor job |
| Review | Finished clips land in History on this account | No shared History on this page |
| Pricing | Credit cost shown before each +5s run; upgrade only if you need more | Higher subscription cost with less flexibility |
根据素材类型选择适合的 Joi AI SI 工作流。
从一个镜头开始，使用 Joi AI SI 继续探索你的下一个视频创意。