Seedance 是火山引擎的视频生成模型，支持文生视频、图生视频、视频到视频等多种模式。

可用模型

支持的统一入参

统一字段支持说明
model✅model
prompt✅content[] 中的 { type: "text", text }
image✅content[] 中的 image_url 项
video✅content[] 中的 video_url 项
audio✅content[] 中的 audio_url 项
ratio✅ratio
resolution✅resolution
headers✅自定义 HTTP 请求头

upstream_options 支持的参数

参数类型说明
callback_urlstring回调地址
return_last_frameboolean返回尾帧
service_tier'default' | 'flex'服务等级
execution_expires_afternumber执行超时
generate_audioboolean生成音频
draftboolean草稿模式
toolsArray<{ type: string }>工具定义
safety_identifierstring安全标识
prioritynumber优先级
durationnumber视频时长
framesnumber帧数
seednumber随机种子
camera_fixedboolean固定镜头
watermarkboolean水印开关

媒体入参映射

媒体输入参数处理规则：

用户传入处理结果
image: "https://..."{ "type": "image_url", "image_url": { "url": "..." }, "role": "reference_image" }
image: { "type": "first_frame", "url": "..." }{ "type": "image_url", "image_url": { "url": "..." }, "role": "first_frame" }
video: "https://..."{ "type": "video_url", "video_url": { "url": "..." }, "role": "reference_video" }
video: { "type": "reference_video", "url": "..." }{ "type": "video_url", "video_url": { "url": "..." }, "role": "reference_video" }
audio: "https://..."{ "type": "audio_url", "audio_url": { "url": "..." }, "role": "reference_audio" }
audio: { "type": "reference_audio", "url": "..." }{ "type": "audio_url", "audio_url": { "url": "..." }, "role": "reference_audio" }

数组会逐项展开；字符串使用默认 role，对象使用对象上的 type 作为 role。

示例：文生视频

curl -X POST https://51kik.com/video/v1/generations \
  -H 'Authorization: Bearer sk-xxxxxxxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "doubao-seedance-1-0-pro-250528",
    "prompt": "一只金毛犬在海边奔跑，夕阳逆光，慢动作",
    "resolution": "720p",
    "ratio": "16:9",
    "upstream_options": {
      "duration": 5,
      "watermark": false,
      "service_tier": "default"
    }
  }'

示例：视频输入

curl -X POST https://51kik.com/video/v1/generations \
  -H 'Authorization: Bearer sk-xxxxxxxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "doubao-seedance-1-0-pro-250528",
    "prompt": "基于参考视频生成续集，保持人物和场景一致",
    "video": { "type": "reference_video", "url": "https://example.com/reference.mp4" },
    "resolution": "720p",
    "upstream_options": { "duration": 5 }
  }'

示例：多模态参考（图片 + 视频 + 音频）

curl -X POST https://51kik.com/video/v1/generations \
  -H 'Authorization: Bearer sk-xxxxxxxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "doubao-seedance-1-0-pro-250528",
    "prompt": "根据首帧、参考视频和背景音乐生成广告片",
    "image": { "type": "first_frame", "url": "https://example.com/first.jpg" },
    "video": "https://example.com/reference.mp4",
    "audio": "https://example.com/bgm.mp3",
    "resolution": "1080p",
    "ratio": "16:9",
    "upstream_options": {
      "duration": 8,
      "generate_audio": true,
      "watermark": false
    }
  }'

计费

Seedance 使用 billingMethod: "modality_tokens"：

请求是否包含 video对客价格字段用量字段
否output_tokens_pricingusage.output_tokens
是input_video_output_tokens_pricingusage.output_tokens

has_input_video 只由统一请求体的 video 字段判断：非空字符串、非空 URL 对象或数组中任一有效视频即为 true。