Source: https://ailoot.ai/models/en/doubao-seedance-1-0-lite-t2v-250428/ Canonical: https://ailoot.ai/models/en/doubao-seedance-1-0-lite-t2v-250428/ Language: en # ByteDance: Seedance 1.0 Lite Text-to-Video [Markdown](https://ailoot.ai/models/en/doubao-seedance-1-0-lite-t2v-250428/index.md) · [JSON](https://ailoot.ai/models/en/doubao-seedance-1-0-lite-t2v-250428/facts.json) ## [ByteDance: Seedance 1.0 Lite Text-to-Video](https://ailoot.ai/models/en/doubao-seedance-1-0-lite-t2v-250428/) Seedance 1.0 Lite Text-to-Video turns a written scene into a silent video. This exact Lite selector uses text rather than an image reference, with 2–12-second duration, 24 fps and landscape, portrait, square or cinematic framing. - [**Ailoot Ultra · Video** `POST /v1/videos` `doubao-seedance-1-0-lite-t2v-250428`](https://ailoot.ai/models/en/doubao-seedance-1-0-lite-t2v-250428/#method-0) About the model This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below. Seedance 1.0 Lite Text-to-Video generates a video from a written scene. The exact selector doubao-seedance-1-0-lite-t2v-250428 is the text-to-video member of the Lite edition. Use it when the subject, setting and movement can be described directly: a product on a tabletop, an establishing view of a location or a brief character action. The output is a video clip; the 1.0 profile does not generate synchronized audio. Write the scene in the order a viewer should see it. Identify the subject and its appearance, the location, the action, the shot size and the camera movement, then describe the final composition. A useful product brief might show a bottle on a pale stone plinth, sunlight moving across the label and a slow push toward the cap. These are instructions for a new scene rather than a claim that the model reproduces a supplied product photograph. Keep the visible action appropriate to the selected clip length. This text-to-video selector is distinct from the separately named Lite image-to-video selector. Its content is supplied as a text item in the content array. A sentence can describe a person, object or style, but it does not attach a reference image or establish an exact visual identity from an unseen file. For a scene whose opening composition must come from an existing image, select an image-capable profile instead of assuming the Lite t2v identity changes modes when a media field is added. The documented 1.0 duration range is two to twelve seconds, with a default of five seconds and a fixed frame rate of 24 fps. Lite offers 480p, 720p and 1080p resolution tiers, with 720p as its documented default. Fixed aspect ratios include 16:9, 4:3, 1:1, 3:4, 9:16 and 21:9. Choose the frame for its destination before generation: portrait for a vertical presentation, square for a compact product panel or landscape for a wide scene. Resolution tiers and aspect ratios describe the requested output; inspect the downloaded clip for its actual pixel dimensions and framing. The request exposes seed, watermark and camera controls. The seed is an integer from -1 through 2^32-1, with -1 selecting randomness. A camera-fixed request adds a fixed-camera instruction, and the documentation explicitly says the effect is not guaranteed. Keep the camera direction consistent between the written scene and the separate control. Parameter instructions embedded in the text take precedence over separate optional parameters, so avoid giving conflicting duration, resolution or framing instructions in both places. Usage is measured in video tokens: output width × output height × frame rate × output duration / 1024. The completed task reports this quantity as usage.completion\_tokens. Retain the reported usage with the finished clip and its requested settings. Generation is asynchronous. Submission returns a task identifier, and the task query supplies its processing status and, after success, the video URL in content.video\_url. Retain the task identifier while the job is queued or running, and save the completed clip for the next revision. The documented generated-file retention period is seven days. The request also has an expiry interval, measured from task creation, after which an unfinished task becomes expired; the documented default is 172800 seconds, with values from 3600 to 259200 seconds. Review the full clip against the brief: whether the intended subject appears, the action occurs in the right order, the camera follows the requested direction and the final frame is usable. Change a specific instruction for the next version while keeping the successful scene structure. For a series of shots, retain each prompt, requested settings and completed video so the next scene can be planned from the actual result. **Ailoot Ultra · Video** `POST /v1/videos` `doubao-seedance-1-0-lite-t2v-250428` [`doubao-seedance-1-0-lite-t2v-250428`](https://ailoot.ai/models/en/#m=doubao-seedance-1-0-lite-t2v-250428&route=Ultra&caller=doubao-seedance-1-0-lite-t2v-250428&fmt=videos) ByteDance /`doubao-seedance-1-0-lite-t2v-250428` ### Overview Seedance 1.0 Lite Text-to-Video turns a written scene into a silent video. This exact Lite selector uses text rather than an image reference, with 2–12-second duration, 24 fps and landscape, portrait, square or cinematic framing. Accepted inputs Text Results Video ### Available in Ailoot · inputs & methods **Ailoot Ultra · Video** `POST /v1/videos` Input types `text` Output types `video` | Field | Type | Requirement | Values & limits | Default | | --- | --- | --- | --- | --- | | Field`model` | Type`string` | RequirementRequired | Values & limits doubao-seedance-1-0-lite-t2v-250428 | Default— | | Field`content` | Type`array` | RequirementRequired | Values & limits Conditions: Native text/media objects; outer array must be non-empty. Nested node types are not validated by this Ailoot generic constructor. | Default— | | Field`duration` | Type`integer` | RequirementOptional | Values & limits Minimum: 2 Maximum: 12 Conditions: Primary 1.x schema 2–12; later shared description names 1.5 as 4–12 or -1. Example uses mutually documented 5. | Default5 | | Field`resolution` | Type`string` | RequirementOptional | Values & limits 480p, 720p, 1080p Conditions: Shared enum; 1080p excluded with reference images and 1.5. Inline pro prose lists 480p/1080p while top-level enum includes720p; no resolved pro 720p guarantee. | Default720p | | Field`ratio` | Type`string` | RequirementOptional | Values & limits 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, adaptive Conditions: Scene/model-dependent defaults; image-input documentation recommends adaptive. | Default— | | Field`service_tier` | Type`string` | RequirementOptional | Values & limits default, flex Conditions: default=online, flex=offline; choose before creation. | Defaultdefault | | Field`seed` | Type`integer` | RequirementRequired | Values & limits Minimum: -1 Maximum: 4,294,967,295 | Default-1 | | Field`camerafixed` | Type`boolean` | RequirementRequired | Values & limits Conditions: Required by Ailoot; reference-image camera control is documented as unsupported and effect is not guaranteed. | Defaultfalse | | Field`watermark` | Type`boolean` | RequirementRequired | Values & limits | Defaultfalse | | Field`execution_expires_after` | Type`integer` | RequirementRequired | Values & limits Minimum: 3,600 Maximum: 259,200 Unit: seconds | Default172,800 | Input material combinations Method parameters and lifecycle | Parameter | Contract | | --- | --- | | Parameter`content_type` | Contractapplication/json | | Parameter`required` | Contractcamerafixed, content, execution\_expires\_after, model, seed, watermark | | Parameter`optional` | Contractduration, resolution, ratio, service\_tier | | Parameter`material_types` | Contracttext | | Parameter`additional_properties` | Contracttrue | | Parameter`validation_scope` | ContractAiloot checks the required field types and a non-empty model/content array. Other request fields are preserved for the selected model. | Method aliases: `/v1/videos/generations` Lifecycle: `submit_once_poll_original` `GET /v1/videos/{request_id}` `GET /v1/videos/generations/{request_id}` `GET /v1/videos/{request_id}/content` `GET /v1/videos/generations/{request_id}/content` Create once and retain returned public id/polling\_url. Poll the original job; download actual owned content.video\_url after succeeded. ### Pricing ##### How the final charge is calculated The displayed rates estimate the cost before generation. The final charge is calculated from the cost recorded for the original generation. Measured output duration and forecast quantities are not the final billable quantity. Tariff references do not add request options. Supported parameters are listed for the selected method. Fast mode Not specified When fast mode is selected Flex mode Not specified When flex mode is selected Maximum reasoning effort Not specified When maximum reasoning effort uses the default adjustment #### Estimated rates for comparison #### Prices by configuration Match each charge to the conditions shown. Use one rate for each set of alternative configurations. | Configuration | Rate schedule | Forecast quantity | Billing unit | Charge | | --- | --- | --- | --- | --- | | ConfigurationBase token rates | Rate scheduleBase rate | Forecast quantity— | Billing unit— | Charge Input · Input tokens · Estimate for comparison only **—** / 1K tokens Output · Output tokens · Estimate for comparison only **—** / 1K tokens Input · Cache read · Estimate for comparison only **—** / 1K tokens Input · Cache write · Estimate for comparison only **—** / 1K tokens Input · Cache write, 1 hour · Estimate for comparison only **—** / 1K tokens | | ConfigurationUltra | Rate schedule— | Forecast quantity— | Billing unitper 1,000 video tokens | Charge Output · Estimate for comparison only **$0.003** per 1,000 video tokens | | ConfigurationEstimated generation cost | Rate schedule— | Forecast quantityone generation estimate | Billing unit— | Charge Output · Estimated generation cost · Estimate for comparison only **$0.144** estimate before generation This estimate is not an additional charge or a fixed rate for the completed generation. | Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/) ### Example requests #### Ailoot Ultra · Video curl · create videocurl · read original taskcurl · download owned video ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" cat > request.json <<'JSON_REQUEST' {"model":"doubao-seedance-1-0-lite-t2v-250428","content":[{"type":"text","text":"女孩抱着狐狸，女孩睁开眼，温柔地看向镜头，狐狸友善地抱着，镜头缓缓拉出，女孩的头发被风吹动"}],"resolution":"480p","ratio":"1:1","duration":5,"service_tier":"default","seed":-1,"camerafixed":false,"watermark":false,"execution_expires_after":172800} JSON_REQUEST curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/videos \ -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \ --data-binary @request.json -D response-headers.txt -o result.json ``` ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" python3 - <<'PY_POLL' import json from pathlib import Path from urllib.parse import quote,urljoin,urlsplit r=json.loads(Path("result.json").read_text()) i=r.get("id") if not isinstance(i,str) or not i.startswith("native302_"):raise SystemExit("Keep original response/headers/id; do not resubmit creation.") u=urljoin("https://api.ailoot.ai",r.get("polling_url") or "/v1/videos/"+quote(i,safe="")) p=urlsplit(u) if p.scheme!="https" or p.netloc!="api.ailoot.ai" or not p.path.startswith("/v1/videos/"):raise SystemExit("Use actual Ailoot lookup path.") Path("poll-url.txt").write_text(u) PY_POLL curl --fail-with-body --silent --show-error "$(cat poll-url.txt)" -H "Authorization: Bearer $AILOOT_API_KEY" -D status-headers.txt -o status.json ``` ```bash set -eu python3 - <<'PY_ASSETS' import json from pathlib import Path from urllib.parse import urlsplit r=json.loads(Path("status.json").read_text()) if r.get("status")!="succeeded":raise SystemExit("Poll same original job until an owned result is returned.") u=r.get("content",{}).get("video_url") urls=[u] if isinstance(u,str) else u if not isinstance(urls,list) or not urls:raise SystemExit("No completed video URL.") for u in urls: if not isinstance(u,str):raise SystemExit("Invalid returned URL.") p=urlsplit(u) if p.scheme!="https" or p.netloc!="api.ailoot.ai" or not p.path.startswith("/v1/media/assets/") or not p.path.endswith("/content") or not p.query:raise SystemExit("Wait for actual Ailoot-owned signed result.") Path("asset-urls.txt").write_text("\n".join(urls)+"\n") PY_ASSETS index=0 while IFS= read -r asset_url; do curl --fail-with-body --silent --show-error "$asset_url" -o "video-${index}.bin" index=$((index + 1)) done < asset-urls.txt ``` ### Receive and save results #### Ailoot Ultra · Video Native JSON with public id/polling\_url. After publication content.video\_url contains Ailoot-owned signed URL(s); before publication selected output URLs are blanked. - `GET /v1/videos/{request_id}` - `GET /v1/videos/generations/{request_id}` - `GET /v1/videos/{request_id}/content` - `GET /v1/videos/generations/{request_id}/content` ##### Keep all completed results Save every completed video or returned file; retrieve every actual returned asset URL. Retain every actual URL in content.video\_url; index must identify a real returned output. ##### If the original response needs checking Preserve original response/headers/id and poll that operation; never resubmit unknown creation. Response fields | Field | Type | | --- | --- | | Field`id` | Typestring | | Field`provider_task_id` | Typestring | | Field`polling_url` | Typestring | | Field`status` | Typestring when supplied | | Field`content.video_url` | Typestring\|string\[\] | | Field`usage` | Typeobject when supplied | Errors and next steps | Response | Condition | Next step | | --- | --- | --- | | Response400 · `invalid_request_error` | ConditionInvalid JSON/model/required field types or content index. | Next step | | Response401 · `authentication_error` | ConditionInvalid Ailoot API key. | Next step | | Response404 · `not_found_error` | ConditionTask/output absent or not owned by same user/API key/group. | Next step | | Response502 · `result_pending_check` | ConditionOriginal submit/status incomplete; preserve original ID, no resubmit. | Next step | | Response503 · `result_pending_check` | ConditionOriginal media/route/settlement is being checked; continue original operation. | Next step | ### Aliases #### Model aliases **Ailoot Ultra** [`doubao-seedance-1-0-lite-t2v-250428`](https://ailoot.ai/models/en/#m=doubao-seedance-1-0-lite-t2v-250428&route=Ultra&caller=doubao-seedance-1-0-lite-t2v-250428&fmt=videos) #### Method path aliases `/v1/videos/generations` #### Related caller IDs [`doubao-seedance-1-0-lite-t2v-250428`](https://ailoot.ai/models/en/#m=doubao-seedance-1-0-lite-t2v-250428&route=Ultra&caller=doubao-seedance-1-0-lite-t2v-250428&fmt=videos) FAQ · ByteDance: Seedance 1.0 Lite Text-to-Video What inputs and results are available? `POST /v1/videos` · `doubao-seedance-1-0-lite-t2v-250428`: `text` → `video` Which fields does the request use? `POST /v1/videos` · `doubao-seedance-1-0-lite-t2v-250428`: `model`, `content`, `duration`, `resolution`, `ratio`, `service_tier`, `seed`, `camerafixed`, `watermark`, `execution_expires_after` What limits apply? `POST /v1/videos` · `doubao-seedance-1-0-lite-t2v-250428`: `duration.minimum`: `2`; `duration.maximum`: `12`; `seed.minimum`: `-1`; `seed.maximum`: `4294967295`; `execution_expires_after.minimum`: `3600`; `execution_expires_after.maximum`: `259200` Connect Ailoot to Claude Code, OpenCode, Hermes or your own app. ## The company and its project portfolio The company and its project portfolio: millions of customers; monthly sales in the billions. ## Buy tokens at a discount. Subscription discounts for regular use. Promo codes offer up to 50% off token purchases. Subscription Choose a discounted plan for your regular requests. Promo code: up to 50% off Enter your code at checkout. The price updates to reflect the current promotion. Spending in your history The model, tokens and amount are recorded for each request. [Choose a subscription](https://ailoot.ai/docs/en/billing/subscriptions/) · [View model prices](https://ailoot.ai/models/en/) ## Connect the API to a product you sell. Use Ailoot in SaaS, apps and bots under its official service offer and licence agreement. Request a reseller licence for resale. Commercial application Add text, image, video and audio generation to paid features in your service. Reseller licence Send a description of your project and how you provide access. Request written terms for use and resale. Documents on the website The service offer, licence agreement and data processing policy are available before you connect. [Request a reseller licence](mailto:support@ailoot.ai) · [Service offer and licence agreement](https://ailoot.ai/legal/offer?lang=en) ## Ailoot · The company and its project portfolio Ailoot combines established operating experience, a large client base, stable service and ongoing KPI control. The company and its project portfolio: millions of customers; monthly sales in the billions. Ailoot brings that operating experience to API access for AI features in customer products, agents, applications and automations.