🧪 Skills

Seedance Video Generation BytePlus

Generate AI videos using BytePlus Seedance API (International). Use when the user wants to: (1) generate videos from text prompts, (2) generate videos from images (first frame, first+last frame, refer

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Description

name: seedance-video-byteplus description: "Generate AI videos using BytePlus Seedance API (International). Use when the user wants to: (1) generate videos from text prompts, (2) generate videos from images (first frame, first+last frame, reference images), or (3) query/manage video generation tasks. Supports Seedance 1.5 Pro (with audio & draft mode), 1.0 Pro, 1.0 Pro Fast, and 1.0 Lite models." version: 1.0.0 category: file-generation argument-hint: "[text prompt or task ID]"

Seedance Video Generation (BytePlus International)

Generate AI videos using ByteDance Seedance models via the BytePlus Ark API (International version).

Prerequisites

The user must set the ARK_API_KEY environment variable with a BytePlus API Key. You can set it by running:

export ARK_API_KEY="your-byteplus-api-key-here"

Get your API Key from the BytePlus API Key Management page.

Base URL: https://ark.ap-southeast.bytepluses.com/api/v3

Supported Models

Model Model ID Capabilities
Seedance 1.5 Pro seedance-1-5-pro-251215 Text-to-video, Image-to-video (first frame, first+last frame), Audio support, Draft mode
Seedance 1.0 Pro seedance-1-0-pro-250428 Text-to-video, Image-to-video (first frame, first+last frame)
Seedance 1.0 Pro Fast seedance-1-0-pro-fast-250528 Text-to-video, Image-to-video (first frame only)
Seedance 1.0 Lite T2V seedance-1-0-lite-t2v-250219 Text-to-video only
Seedance 1.0 Lite I2V seedance-1-0-lite-i2v-250219 Image-to-video (first frame, first+last frame, reference images 1-4)

Default model: seedance-1-5-pro-251215 (latest, supports audio)

Execution (Recommended: Python CLI Tool)

A Python CLI tool is provided at ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py for robust execution with proper error handling, automatic polling, and local image base64 conversion. Prefer using this tool over raw curl commands.

Quick Examples with Python CLI

# Text-to-video (create + wait + download)
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "A kitten yawning at the camera" --wait --download ~/Desktop

# Image-to-video from local file
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "The person slowly turns and smiles" --image /path/to/photo.jpg --wait --download ~/Desktop

# Image-to-video from URL
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "The landscape slowly zooms in" --image "https://example.com/image.jpg" --wait --download ~/Desktop

# First + last frame
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "A flower blooming from bud to full bloom" --image first.jpg --last-frame last.jpg --wait --download ~/Desktop

# Reference images (Lite I2V only)
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "[Image 1] person is dancing" --ref-images ref1.jpg ref2.jpg --model seedance-1-0-lite-i2v-250219 --wait --download ~/Desktop

# Custom parameters
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "City night scene time-lapse" --ratio 21:9 --duration 8 --resolution 1080p --generate-audio false --wait --download ~/Desktop

# Draft mode (cheaper preview, Seedance 1.5 Pro only)
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --prompt "Waves crashing on the beach" --draft true --wait --download ~/Desktop

# Generate final video from a draft
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py create --draft-task-id <DRAFT_TASK_ID> --resolution 720p --wait --download ~/Desktop

# Query task status
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py status <TASK_ID>

# Wait for an existing task
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py wait <TASK_ID> --download ~/Desktop

# List tasks
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py list --status succeeded

# Delete/cancel task
python3 ~/.claude/skills/seedance-video-byteplus/seedance_byteplus.py delete <TASK_ID>

Alternative: Raw curl Commands

Step 1: Create Video Generation Task

Determine the generation mode based on user input, then call the API.

Mode A: Text-to-Video

TASK_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-5-pro-251215",
    "content": [
      {
        "type": "text",
        "text": "YOUR_PROMPT_HERE"
      }
    ],
    "ratio": "16:9",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }')

TASK_ID=$(echo "$TASK_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
echo "Task created: $TASK_ID"

Mode B: Image-to-Video (First Frame)

The user provides one image as the first frame. The image can be a URL or local file path (convert to base64).

With image URL:

TASK_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-5-pro-251215",
    "content": [
      {
        "type": "text",
        "text": "YOUR_PROMPT_HERE"
      },
      {
        "type": "image_url",
        "image_url": { "url": "IMAGE_URL_HERE" },
        "role": "first_frame"
      }
    ],
    "ratio": "adaptive",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }')

TASK_ID=$(echo "$TASK_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
echo "Task created: $TASK_ID"

With local image file (convert to base64):

IMG_PATH="/path/to/image.png"
IMG_EXT="${IMG_PATH##*.}"
IMG_EXT_LOWER=$(echo "$IMG_EXT" | tr '[:upper:]' '[:lower:]')
IMG_BASE64=$(base64 < "$IMG_PATH" | tr -d '\n')
IMG_DATA_URL="data:image/${IMG_EXT_LOWER};base64,${IMG_BASE64}"

TASK_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-5-pro-251215",
    "content": [
      {
        "type": "text",
        "text": "YOUR_PROMPT_HERE"
      },
      {
        "type": "image_url",
        "image_url": { "url": "'"$IMG_DATA_URL"'" },
        "role": "first_frame"
      }
    ],
    "ratio": "adaptive",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }')

TASK_ID=$(echo "$TASK_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
echo "Task created: $TASK_ID"

Mode C: Image-to-Video (First + Last Frame)

Requires two images. Supported by: Seedance 1.5 Pro, 1.0 Pro, 1.0 Lite I2V.

TASK_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-5-pro-251215",
    "content": [
      {
        "type": "text",
        "text": "YOUR_PROMPT_HERE"
      },
      {
        "type": "image_url",
        "image_url": { "url": "FIRST_FRAME_IMAGE_URL" },
        "role": "first_frame"
      },
      {
        "type": "image_url",
        "image_url": { "url": "LAST_FRAME_IMAGE_URL" },
        "role": "last_frame"
      }
    ],
    "ratio": "adaptive",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }')

TASK_ID=$(echo "$TASK_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
echo "Task created: $TASK_ID"

Mode D: Reference Image-to-Video (Seedance 1.0 Lite I2V only)

Provide 1-4 reference images. Use [Image 1], [Image 2] in prompt to reference specific images.

TASK_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-0-lite-i2v-250219",
    "content": [
      {
        "type": "text",
        "text": "A boy from [Image 1] and a corgi from [Image 2], sitting on the lawn"
      },
      {
        "type": "image_url",
        "image_url": { "url": "REF_IMAGE_URL_1" },
        "role": "reference_image"
      },
      {
        "type": "image_url",
        "image_url": { "url": "REF_IMAGE_URL_2" },
        "role": "reference_image"
      }
    ],
    "ratio": "16:9",
    "duration": 5,
    "resolution": "720p"
  }')

TASK_ID=$(echo "$TASK_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
echo "Task created: $TASK_ID"

Step 2: Poll for Task Completion

Video generation is asynchronous. Poll the task status until it completes.

echo "Waiting for video generation to complete..."
while true; do
  STATUS_RESULT=$(curl -s -X GET "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks/${TASK_ID}" \
    -H "Authorization: Bearer $ARK_API_KEY")

  STATUS=$(echo "$STATUS_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['status'])")

  if [ "$STATUS" = "succeeded" ]; then
    echo "Video generation succeeded!"
    VIDEO_URL=$(echo "$STATUS_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['content']['video_url'])")
    echo "Video URL: $VIDEO_URL"
    break
  elif [ "$STATUS" = "failed" ]; then
    ERROR_MSG=$(echo "$STATUS_RESULT" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('error',{}).get('message','Unknown error'))" 2>/dev/null || echo "Unknown error")
    echo "Video generation failed: $ERROR_MSG"
    break
  elif [ "$STATUS" = "expired" ]; then
    echo "Video generation task expired."
    break
  else
    echo "Status: $STATUS - still processing..."
    sleep 15
  fi
done

Step 3: Download and Open Video

OUTPUT_PATH="$HOME/Desktop/seedance_video_$(date +%Y%m%d_%H%M%S).mp4"
curl -s -o "$OUTPUT_PATH" "$VIDEO_URL"
echo "Video saved to: $OUTPUT_PATH"
open "$OUTPUT_PATH"

Optional Parameters Reference

Parameter Type Default Description
model string seedance-1-5-pro-251215 Model ID to use
ratio string 16:9 (t2v) / adaptive (i2v) Aspect ratio: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, adaptive
duration integer 5 Video duration in seconds (4-12 for 1.5 Pro, 2-12 for others). Set -1 for auto (1.5 Pro only)
resolution string 720p Resolution: 480p, 720p, 1080p
seed integer -1 Random seed for reproducibility. -1 = random
camera_fixed boolean false Fix camera position
watermark boolean false Add watermark to video
generate_audio boolean true Generate synchronized audio (Seedance 1.5 Pro only)
draft boolean false Generate draft/preview video at lower cost (Seedance 1.5 Pro only, forces 480p)
return_last_frame boolean false Return last frame image URL (for chaining consecutive videos)
service_tier string default default (online) or flex (offline, 50% cheaper, slower)
execution_expires_after integer 172800 Task timeout in seconds (3600-259200)

Additional Operations

Query Task Status

curl -s -X GET "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks/${TASK_ID}" \
  -H "Authorization: Bearer $ARK_API_KEY" | python3 -m json.tool

List Tasks

# List all tasks (paginated)
curl -s -X GET "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks?page_num=1&page_size=10" \
  -H "Authorization: Bearer $ARK_API_KEY" | python3 -m json.tool

# Filter by status
curl -s -X GET "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks?page_num=1&page_size=10&filter.status=succeeded" \
  -H "Authorization: Bearer $ARK_API_KEY" | python3 -m json.tool

Cancel or Delete Task

curl -s -X DELETE "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks/${TASK_ID}" \
  -H "Authorization: Bearer $ARK_API_KEY"

Note: queued tasks will be cancelled; succeeded/failed/expired tasks will be deleted from history. running and cancelled tasks cannot be deleted.

Generate Consecutive Videos (Using Last Frame)

Set return_last_frame: true on the first task, then use the returned last_frame_url as the first frame of the next task.

# Get last frame URL from completed task
LAST_FRAME_URL=$(curl -s -X GET "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks/${TASK_ID}" \
  -H "Authorization: Bearer $ARK_API_KEY" | python3 -c "import sys,json; print(json.load(sys.stdin)['content']['last_frame_url'])")

# Use it as first frame for the next video
# ... (use Mode B with LAST_FRAME_URL as the image URL)

Draft Mode (Seedance 1.5 Pro only)

Generate a cheap preview first, then produce the final video if satisfied:

# Step 1: Create draft (forces 480p)
DRAFT_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-5-pro-251215",
    "content": [
      { "type": "text", "text": "YOUR_PROMPT_HERE" }
    ],
    "draft": true,
    "resolution": "480p"
  }')
DRAFT_TASK_ID=$(echo "$DRAFT_RESULT" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")

# Step 2: After draft succeeds, generate final video from draft
FINAL_RESULT=$(curl -s -X POST "https://ark.ap-southeast.bytepluses.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "seedance-1-5-pro-251215",
    "content": [
      {
        "type": "draft_task",
        "draft_task": { "id": "'"$DRAFT_TASK_ID"'" }
      }
    ],
    "resolution": "720p"
  }')

Image Requirements

  • Formats: JPEG, PNG, WebP, BMP, TIFF, GIF (Seedance 1.5 Pro also supports HEIC, HEIF)
  • Aspect ratio (width/height): between 0.4 and 2.5
  • Shorter side must be > 300 pixels, longer side must be < 6000 pixels
  • Max file size: 30 MB

Resolution and Aspect Ratio Pixel Values

Resolution Ratio Seedance 1.0 Series (W x H) Seedance 1.5 Pro (W x H)
480p 16:9 864x480 864x496
480p 1:1 640x640 640x640
480p 9:16 480x864 496x864
720p 16:9 1248x704 1280x720
720p 1:1 960x960 960x960
720p 9:16 704x1248 720x1280
1080p 16:9 1920x1088 1920x1080
1080p 1:1 1440x1440 1440x1440
1080p 9:16 1088x1920 1080x1920

Sending Videos via Feishu App (OpenClaw)

See how_to_send_video_via_feishu_app.md

Rules

  1. Always check that ARK_API_KEY is set before making API calls: [ -z "$ARK_API_KEY" ] && echo "Error: ARK_API_KEY not set" && exit 1
  2. Default to Seedance 1.5 Pro (seedance-1-5-pro-251215) unless user requests a specific model.
  3. Default to 720p, 16:9, 5 seconds, with audio for text-to-video.
  4. Default to adaptive ratio for image-to-video (auto-adapts to the input image).
  5. Poll interval: 15 seconds between status checks.
  6. Video URLs expire in 24 hours - always download immediately after generation.
  7. Task history is kept for 7 days only.
  8. For local image files, convert to base64 data URL format before sending.
  9. Always show the user the task ID so they can check status later.
  10. When generation fails, display the error message clearly and suggest possible fixes.

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