Source: https://ailoot.ai/models/en/doubao-seedance-2-0-260128/ Canonical: https://ailoot.ai/models/en/doubao-seedance-2-0-260128/ Language: en # ByteDance: Seedance 2.0 [Markdown](https://ailoot.ai/models/en/doubao-seedance-2-0-260128/index.md) · [JSON](https://ailoot.ai/models/en/doubao-seedance-2-0-260128/facts.json) ## [ByteDance: Seedance 2.0](https://ailoot.ai/models/en/doubao-seedance-2-0-260128/) Seedance 2.0 generates and edits video using text, images, video and audio references. It can continue existing footage and generate synchronized sound, with 4–15-second duration, 480p or 720p output and explicit reference roles. - [**Ailoot Ultra · Video** `POST /v1/videos` `doubao-seedance-2-0-260128`](https://ailoot.ai/models/en/doubao-seedance-2-0-260128/#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 2.0 generates video from a written scene or a combination of image, video and audio references. The exact selector doubao-seedance-2-0-260128 identifies the standard 2.0 profile. Its documented workflows include new video generation, editing and extension of existing footage. Use references to communicate appearance, movement, camera language and sound, then state which parts of the scene they should control. Text can be supplied alone. The documented multimodal combinations also allow images or video with optional text, images with audio, video with audio, and images, video and audio together. Audio therefore accompanies visual media in these listed combinations; it is not described as a standalone audio-to-video request. Write the intended result clearly even where text is optional, so the role of each reference is explicit rather than left to be inferred from unrelated assets. The content array distinguishes text, image\_url, video\_url and audio\_url items. Multimodal references use roles such as reference\_image, reference\_video and reference\_audio. An image can define the person, object, location or look. A video can demonstrate a performance, movement or camera view, and audio can establish a track or timing. State the assignment in the brief: keep the subject from the image, follow the camera view of the video and use the audio as the background. Do not ask every reference to define every property at once. The documented advertising example combines two product images with a video and an audio reference. It describes an opening view, an action sequence, close product detail and a closing composition while keeping the background voice consistent. The same structure can organize a short showcase: establish the object, demonstrate one action and finish on its recognizable feature. For an edit, identify the source footage and the element that should change; for an extension, explain the action that continues beyond the existing scene while preserving the subject and movement direction. The 2.0 profile documents whole-second duration from four to fifteen, or -1 for an automatically selected duration within that range. The default is five seconds. Its resolution options are 480p and 720p, with 720p as the default; 1080p is excluded for 2.0. Fixed aspect ratios include 16:9, 4:3, 1:1, 3:4, 9:16 and 21:9. Adaptive ratio can choose framing from the prompt or reference: first-frame work follows the opening image, and multimodal work uses the intended scene or the first relevant media, with video taking priority over images. Check the task result for the actual ratio and duration. Generated sound is controlled separately from reference media. generate\_audio=true requests synchronized voices, effects and background music based on the text and visual content; false requests a silent video. The documented default is true, and quoted dialogue is recommended for speech. Specify who speaks and how the sound relates to the visible action, then inspect the actual wording, voice assignment and timing. Supplying an audio reference and enabling generated sound are distinct request choices. The 2.0 guide excludes the older frames and camera\_fixed controls and does not support flex offline processing. Use the duration field and describe the camera movement in the scene itself. Seed and watermark remain documented controls; the guide says the same request and seed can produce similar results without guaranteeing exact identity. Avoid treating a seed as proof of reproducibility, or a repeated request as an already inspected clip. Video-token usage is calculated as (input-video duration + output-video duration) × output width × output height × output frame rate / 1024. Requests containing input video and those without input video have distinct billing categories. The task query reports usage.completion\_tokens and usage.total\_tokens; retain these reported quantities with the completed clip. The workflow is asynchronous: submission returns a task identifier, and the completed task supplies content.video\_url together with reported duration, resolution, ratio, frame rate and token usage. Preserve the identifier and save the completed video with the original references and prompt. The expiry field defaults to 172800 seconds and accepts 3600–259200 seconds from task creation; a task that exceeds the interval becomes expired. Review the entire output, including the edit or continuation join, for character appearance, object detail, spatial relationships, camera continuity and sound-to-picture timing. **Ailoot Ultra · Video** `POST /v1/videos` `doubao-seedance-2-0-260128` [`doubao-seedance-2-0-260128`](https://ailoot.ai/models/en/#m=doubao-seedance-2-0-260128&route=Ultra&caller=doubao-seedance-2-0-260128&fmt=videos) ByteDance /`doubao-seedance-2-0-260128` ### Overview Seedance 2.0 generates and edits video using text, images, video and audio references. It can continue existing footage and generate synchronized sound, with 4–15-second duration, 480p or 720p output and explicit reference roles. Accepted inputs Text · Images · Video · Audio Results Video ### Available in Ailoot · inputs & methods **Ailoot Ultra · Video** `POST /v1/videos` Input types `text`, `image`, `video`, `audio` Output types `video` | Field | Type | Requirement | Values & limits | Default | | --- | --- | --- | --- | --- | | Field`model` | Type`string` | RequirementRequired | Values & limits doubao-seedance-2-0-260128 | 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`generate_audio` | Type`boolean` | RequirementOptional | Values & limits Conditions: Synchronized sound embedded in video. | Defaulttrue | | Field`duration` | Type`integer` | RequirementOptional | Values & limits Conditions: Integer 4–15 or -1; actual output duration returned. | Default5 | | Field`resolution` | Type`string` | RequirementOptional | Values & limits 480p, 720p Conditions: 1080p explicitly unsupported for 2.0/fast. | Default720p | | Field`ratio` | Type`string` | RequirementOptional | Values & limits 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, adaptive Conditions: Adaptive explicitly scoped to 2.0/fast/1.5; 2.5 example 16:9 only. | Defaultadaptive | | Field`watermark` | Type`boolean` | RequirementOptional | Values & limits | Defaultfalse | | Field`seed` | Type`integer` | RequirementOptional | Values & limits Minimum: -1 Maximum: 4,294,967,295 | Default-1 | | Field`execution_expires_after` | Type`integer` | RequirementOptional | Values & limits Minimum: 3,600 Maximum: 259,200 Unit: seconds | Default172,800 | | Field`service_tier` | Type`string` | RequirementOptional | Values & limits default Conditions: 2.0/fast exclude offline flex; 2.5 scope is not established. | Defaultdefault | | Field`safety_identifier` | Type`string` | RequirementOptional | Values & limits | Default— | | Field`tools` | Type`object` | RequirementOptional | Values & limits Conditions: Only 2.0/fast; documented type=web\_search. | Default— | Input material combinations Method parameters and lifecycle | Parameter | Contract | | --- | --- | | Parameter`content_type` | Contractapplication/json | | Parameter`required` | Contractcontent, model | | Parameter`optional` | Contractgenerate\_audio, duration, resolution, ratio, watermark, seed, execution\_expires\_after, service\_tier, safety\_identifier, tools | | Parameter`material_types` | Contracttext, image, video, audio | | 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. | | Parameter`material_combinations` | Contracttext, image, video, image, audio, image, video, video, audio, image, video, audio | | Parameter`optional_text_with_media` | Contracttrue | | Parameter`reference_media_count_and_size_limits` | Contractnull | 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 | | ConfigurationInput contains video. | Rate schedule— | Forecast quantity— | Billing unitper 1,000 video tokens | Charge Output · Estimate for comparison only **$0.0096** per 1,000 video tokens | | ConfigurationInput contains no video. | Rate schedule— | Forecast quantity— | Billing unitper 1,000 video tokens | Charge Output · Estimate for comparison only **$0.015768** 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 **$0.822402** estimate before generation This estimate is not an additional charge or a fixed rate for the completed generation. | Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/) ### Example requests #### Ailoot Ultra · Video curl · create videocurl · read original taskcurl · download owned video ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" cat > request.json <<'JSON_REQUEST' {"model":"doubao-seedance-2-0-260128","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"}]} 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-2-0-260128`](https://ailoot.ai/models/en/#m=doubao-seedance-2-0-260128&route=Ultra&caller=doubao-seedance-2-0-260128&fmt=videos) #### Method path aliases `/v1/videos/generations` #### Related caller IDs [`doubao-seedance-2-0-260128`](https://ailoot.ai/models/en/#m=doubao-seedance-2-0-260128&route=Ultra&caller=doubao-seedance-2-0-260128&fmt=videos) FAQ · ByteDance: Seedance 2.0 What inputs and results are available? `POST /v1/videos` · `doubao-seedance-2-0-260128`: `text`, `image`, `video`, `audio` → `video` Which fields does the request use? `POST /v1/videos` · `doubao-seedance-2-0-260128`: `model`, `content`, `generate_audio`, `duration`, `resolution`, `ratio`, `watermark`, `seed`, `execution_expires_after`, `service_tier`, `safety_identifier`, `tools` What limits apply? `POST /v1/videos` · `doubao-seedance-2-0-260128`: `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. 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