Seedance 1.5 Pro

ByteDance Seedance video generation with audio support and end frame control

Endpoints

Authentication

All requests require an API Key in the header:

Authorization: Bearer YOUR_API_KEY

Request Body

{
  "request_type": "async",
  "callback_url": "https://...",
  "provider": "auto",
  "input": {
    "mode": "text-to-video",
    "prompt": "...",
    "resolution": "720p",
    "duration": 8,
    "sound": true,
    "aspect_ratio": "16:9",
    "fixed_lens": false,
    "image_urls": ["..."]
  }
}

Parameters

Mode Options:

• text-to-video — Generate video from text
• image-to-video — Generate video from image (supports 1-2 images for end frame control)

Example

Text-to-Video

curl -X POST "https://api.apixo.ai/api/v1/generateTask/seedance-1-5-pro" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "async",
    "provider": "value",
    "input": {
      "mode": "text-to-video",
      "prompt": "a calm seaside sunrise with gentle camera dolly movement",
      "resolution": "720p",
      "duration": 8,
      "sound": true,
      "aspect_ratio": "16:9",
      "fixed_lens": false
    }
  }'

Image-to-Video (with End Frame Control)

curl -X POST "https://api.apixo.ai/api/v1/generateTask/seedance-1-5-pro" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "request_type": "callback",
    "callback_url": "https://your-server.com/callback",
    "provider": "official",
    "input": {
      "mode": "image-to-video",
      "prompt": "animate this landscape with moving clouds and wind",
      "resolution": "480p",
      "duration": 4,
      "sound": false,
      "image_urls": [
        "https://example.com/head.jpg",
        "https://example.com/tail.jpg"
      ],
      "aspect_ratio": "1:1"
    }
  }'

Response

POST /api/v1/generateTask/seedance-1-5-pro

Returns taskId on success for subsequent status queries.

Success:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678"
  }
}

Error:

{
  "code": 400,
  "message": "Insufficient credits",
  "data": null
}

GET /api/v1/statusTask/seedance-1-5-pro

Query task execution status and results via taskId.

curl -X GET "https://api.apixo.ai/api/v1/statusTask/seedance-1-5-pro?taskId=task_12345678" \
  -H "Authorization: Bearer YOUR_API_KEY"

Success:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "success",
    "resultJson": "{\"resultUrls\":[\"https://r2.apixo.ai/video.mp4\"]}",
    "createTime": 1767965610929,
    "completeTime": 1767965652317,
    "costTime": 41388
  }
}

Failed:

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_12345678",
    "state": "failed",
    "failCode": "CONTENT_VIOLATION",
    "failMsg": "Content does not meet safety guidelines"
  }
}

Status Response Fields

Error Codes

Rate Limits

Exceeding limits returns 429 error. Wait and retry.

Tips

• Generation time:
  • 4-second video: ~40-60 seconds
  • 8-second video: ~60-90 seconds
  • 12-second video: ~90-120 seconds
  • Submit task, wait 50 seconds, then poll every 5 seconds
• Callback mode: Video generation takes time, strongly recommend using callback mode.
• Video expiration: Result URLs are valid for 15 days. Download promptly.
• Content moderation: Prompts must comply with content safety guidelines.
• Audio generation: Seedance 1.5 Pro supports audio generation:
  • sound: true: Auto-generates matching ambient sounds and background music
  • sound: false: Generates silent video
  • Describe sound effects in prompt for better audio (e.g., "ocean waves", "bird sounds")
• End frame control: image-to-video mode supports 2 images:
  • 1st image: Video start frame
  • 2nd image: Video end frame
  • Enables precise start/end control, ideal for transitions and scene changes
• Fixed lens:
  • fixed_lens: true: Camera stays still, ideal for product showcases, close-ups
  • fixed_lens: false: Allows dynamic camera movement (dolly, pan, etc.)
• Resolution selection:
  • 480p: Fast generation, for previews and social media
  • 720p: High quality, for most publishing scenarios
• Duration: Supports 4/8/12 second options, billed per second.
• Aspect ratio suggestions:
  • 1:1: Square, for social media (default)
  • 16:9: Landscape, for traditional video platforms
  • 9:16: Portrait, for short video platforms
  • 21:9: Ultra-wide, for cinematic feel
• Prompt tips:
  • Describe both visual and audio effects for better synchronization
  • Specify camera movement (e.g., "slow dolly in", "orbiting shot")
  • Describe dynamic elements (e.g., "drifting clouds", "swaying leaves")
• Image formats: image_urls supports JPG, PNG, WebP, max 10MB per image.

Related

• Pricing
• Error Codes