| name | seedance-video |
| description | Generate and edit AI videos with Seedance via AceDataCloud API. Use for text/image video, Seedance 2.x multimodal image/audio/video reference, Seedance 2.5 pure-audio reference, edit, extend, and up to 30-second output. Supports multiple models, up to 4k, aspect ratio, and optional audio generation. |
| license | Apache-2.0 |
| metadata | {"author":"acedatacloud","version":"1.0"} |
| compatibility | Requires ACEDATACLOUD_API_TOKEN in .env file (see _shared/authentication.md). Optionally pair with mcp-seedance for tool-use. |
Seedance Video Generation
Generate AI dance and motion videos through AceDataCloud's Seedance (ByteDance) API.
Setup: See authentication for token setup.
Quick Start
curl -X POST https://api.acedata.cloud/seedance/videos \
-H "Authorization: Bearer $ACEDATACLOUD_API_TOKEN" \
-H "Content-Type: application/json" \
-d '{"model": "doubao-seedance-2-0-260128", "content": [{"type": "text", "text": "a dancer performing contemporary ballet in a misty forest"}], "callback_url": "https://api.acedata.cloud/health"}'
Async: See async task polling. Poll via POST /seedance/tasks with {"id": "..."}.
This returns a task ID immediately. Poll for the result:
curl -X POST https://api.acedata.cloud/seedance/tasks \
-H "Authorization: Bearer $ACEDATACLOUD_API_TOKEN" \
-H "Content-Type: application/json" \
-d '{"id": "<task_id from above>"}'
Models
Seedance 2.5 (latest flagship)
| Model | Best For | Limits |
|---|
doubao-seedance-2-5-260628 | Up to 30 seconds, pure-audio or multimodal reference, video edit/extend | 480p, 720p, 1080p; 30 images / 10 videos / 10 audios / 50 total |
Use omni_reference_task_type: "auto", "edit", or "extend". Edit and extend require reference_video and ratio: "adaptive"; edit also requires duration: -1. Optional output_format is mp4 or mov.
Seedance 2.0 (multimodal reference, up to 4k)
The 2.0 series adds multimodal reference inputs: real-person / character image references, reference audio, and reference video (see the workflows below).
| Model | Best For | Max resolution |
|---|
doubao-seedance-2-0-260128 | Highest quality, real-person/character reference, 4k output | 4k |
doubao-seedance-2-0-fast-260128 | Faster 2.0 generation | 720p |
doubao-seedance-2-0-mini-260615 | Lightweight / most cost-effective 2.0 | 720p |
Seedance 1.x
| Model | Type | Best For |
|---|
doubao-seedance-1-5-pro-251215 | Text+Image-to-Video | 1.5 flagship, audio support |
doubao-seedance-1-0-pro-250528 | Text+Image-to-Video | General-purpose, reliable quality |
doubao-seedance-1-0-pro-fast-251015 | Text+Image-to-Video | Faster Pro generation |
doubao-seedance-1-0-lite-t2v-250428 | Text-to-Video only | Lightweight text-to-video |
doubao-seedance-1-0-lite-i2v-250428 | Image-to-Video only | Lightweight image-to-video |
Workflows
1. Text-to-Video
Pass a text content item in the content array.
POST /seedance/videos
{
"model": "doubao-seedance-1-0-pro-250528",
"content": [
{"type": "text", "text": "a street dancer doing breakdancing moves in an urban setting"}
],
"resolution": "1080p",
"ratio": "16:9",
"duration": 5
}
2. Image-to-Video
Include an image content item (with an optional role) alongside the text.
POST /seedance/videos
{
"model": "doubao-seedance-1-5-pro-251215",
"content": [
{"type": "text", "text": "the person starts dancing gracefully"},
{
"type": "image_url",
"role": "first_frame",
"image_url": {"url": "https://example.com/dancer.jpg"}
}
],
"resolution": "720p",
"duration": 5
}
Image roles:
first_frame — image is used as the opening framelast_frame — image is used as the closing framereference_image — image is used as a style / subject / real-person reference (Seedance 2.0 keeps the referenced person or character consistent)
Reference media (Seedance 2.x):
audio_url — use role: "reference_audio"video_url — use role: "reference_video"- 2.5 accepts pure-audio reference; 2.0 requires an image or video alongside audio
3. First-frame + Last-frame
Provide both a start and end frame image:
POST /seedance/videos
{
"model": "doubao-seedance-2-0-260128",
"content": [
{"type": "text", "text": "smooth transition between two scenes"},
{"type": "image_url", "role": "first_frame", "image_url": {"url": "https://example.com/start.jpg"}},
{"type": "image_url", "role": "last_frame", "image_url": {"url": "https://example.com/end.jpg"}}
]
}
4. Real-person / character reference (Seedance 2.0)
Seedance 2.0 models (doubao-seedance-2-0-260128, doubao-seedance-2-0-fast-260128, doubao-seedance-2-0-mini-260615) can keep a specific person or character consistent across a brand-new scene. Pass one or more photos as image_url items with role: "reference_image" — the model preserves that subject's appearance. Up to 9 reference images are accepted.
POST /seedance/videos
{
"model": "doubao-seedance-2-0-260128",
"content": [
{"type": "text", "text": "the same person walking through a neon-lit night market, cinematic"},
{"type": "image_url", "role": "reference_image", "image_url": {"url": "https://example.com/person.jpg"}}
],
"resolution": "1080p",
"duration": 8
}
5. Reference audio / video (Seedance 2.0)
2.0 models also accept reference audio (voice timbre, background music) and reference video (subject content, camera movement, motion, overall style). Add audio_url and/or video_url content items. Limits: up to 3 audio and 3 video references per request.
POST /seedance/videos
{
"model": "doubao-seedance-2-0-260128",
"content": [
{"type": "text", "text": "a singer performing on stage, matching the reference voice and motion"},
{"type": "image_url", "role": "reference_image", "image_url": {"url": "https://example.com/person.jpg"}},
{"type": "audio_url", "role": "reference_audio", "audio_url": {"url": "https://example.com/voice.mp3"}},
{"type": "video_url", "role": "reference_video", "video_url": {"url": "https://example.com/motion.mp4"}}
],
"generate_audio": true
}
Parameters
| Parameter | Values | Description |
|---|
model | see Models table | Model to use (required) |
content | array | Input items: text, image_url, audio_url (2.0), video_url (2.0) (required) |
resolution | "480p", "720p", "1080p", "4k" | Output resolution. 4k is doubao-seedance-2-0-260128 (standard) only; 2-0-fast / 2-0-mini max out at 720p (default: 720p for pro/2.0, 480p for lite) |
ratio | "16:9", "4:3", "1:1", "3:4", "9:16", "21:9", "adaptive" | Aspect ratio (default: 16:9) |
duration | 2 – 30, or -1 | 1.0: 2–12 (no auto); 1.5 Pro: 4–12/-1; 2.0: 4–15/-1; 2.5: 4–30/-1 |
frames | 29–289 (must satisfy 25+4n) | Frame count — mutually exclusive with duration |
seed | -1 to 4294967295 | Seed for reproducible results (-1 = random) |
generate_audio | true / false | Generate audio (supported by doubao-seedance-1-5-pro-251215 and the doubao-seedance-2-0 series; other models ignore it) |
camerafixed | true / false | Fix the camera position during generation |
watermark | true / false | Add a watermark to the generated video |
return_last_frame | true / false | Return the last frame of the generated video |
omni_reference_task_type | auto, edit, extend | Seedance 2.5 task type |
output_format | mp4, mov | Seedance 2.5 output format |
tools | object[] | Seedance 2.5 web search tool, e.g. [{"type":"web_search"}] |
priority | 0–9 | Seedance 2.5 queue priority |
safety_identifier | string | Stable anonymous end-user ID (max 64 chars; do not send PII) |
execution_expires_after | number | Task timeout threshold in seconds |
Inline Parameter Syntax
You can also embed generation parameters directly in the text prompt using the --param value syntax:
A kitten yawning at the camera. --rs 720p --rt 16:9 --dur 5 --fps 24 --seed 42
Supported inline params: --rs (resolution), --rt (ratio), --dur (duration), --frames, --fps (24 only), --seed, --cf (camera_fixed), --wm (watermark).
Gotchas
- Model names use the
doubao-* convention (e.g. doubao-seedance-1-0-pro-250528) — old short names like seedance-1.0 are not valid
- The
content array replaces the old prompt + image_url fields; always use content
- Image and text scenarios are mutually exclusive per content item — each item has either
text or image_url, not both
first_frame and last_frame may be combined in one request, but reference_image is mutually exclusive with first_frame / last_frame — do not mix a reference image with first/last framesgenerate_audio: true is supported by doubao-seedance-1-5-pro-251215 and the doubao-seedance-2-0 series; other models ignore this field- Lite models are split:
*-lite-t2v-* only accepts text, *-lite-i2v-* only accepts image-to-video
audio_url and video_url reference items are supported by Seedance 2.0 and 2.5; 2.5 also supports pure-audio reference- Resolution options are
480p, 720p, 1080p, and 4k (4k is doubao-seedance-2-0-260128 only; 2-0-fast / 2-0-mini max out at 720p) — there is no 360p or 540p
- Duration is model-specific: 1.0 supports 2–12; 1.5 Pro supports 4–12/-1; 2.0 supports 4–15/-1; 2.5 supports 4–30/-1
- Task states use
"succeeded" (not "completed") — check for this value when polling
