Seedance Video Creation

Generate AI videos using ByteDance Seedance. Use when the user wants to: (1) generate videos from text prompts, (2) generate videos from images (first frame,...

Security Scan

The skill mostly does what its description says (call ByteDance/Volcengine Ark to create videos) but its declared metadata does not match the runtime instructions and included docs — notably a required ARK_API_KEY is not declared in the registry, and docs reference Feishu credentials and specific local paths — which is an incoherence you should investigate before installing.

Purpose & Capability

The name/description (Seedance video generation) matches the included code and instructions: the Python CLI talks to the Ark API to create/query/download video tasks. However the registry metadata claims no required env vars/credentials while the SKILL.md and seedance.py require ARK_API_KEY. Also supplemental docs reference Feishu app credentials for sending files — those credentials are not declared in the skill metadata. These mismatches are unexpected.

Instruction Scope

SKILL.md and seedance.py perform expected actions for this purpose: reading local image files (base64 conversion), calling the Ark API, polling task status, and downloading video files. The included how_to_send_video_via_feishu_app.md documents reading local video files and using an external 'message' tool that uploads to Feishu (which requires Feishu app tokens and filesystem access). The instructions do not read arbitrary system files or other credentials beyond what is documented, but they do assume local file read/write and network access to external APIs.

Install Mechanism

This is an instruction-only skill with an included Python CLI file; there is no external install script or third‑party download URL. The code will run locally (seedance.py) when invoked. No unusual install mechanism or remote archive extraction is present.

Credentials

The runtime requires ARK_API_KEY (seedance.py will exit if it's not set) but the registry metadata lists no required environment variables — an explicit inconsistency. The Feishu integration doc describes needing Feishu app_access_token / app_id/app_secret stored in OpenClaw config, but those credentials are not declared by the skill. This mismatch increases the risk of surprising credential use or missing disclosure.

Persistence & Privilege

The skill is not always-enabled and does not request elevated or persistent system privileges. It does not modify other skills' configurations. It reads/writes user-specified file paths when downloading results (normal for a file-generation tool).

What to consider before installing

Before installing or running this skill: - Expect to provide an ARK_API_KEY environment variable; verify this requirement in the registry metadata or ask the publisher to update metadata to include it. Do not supply keys you do not trust. - Inspect the included seedance.py yourself (it is shipped with the skill) — it runs locally and makes HTTP requests to https://ark.cn-beijing.volces.com; confirm there are no additional hidden endpoints or suspicious behavior. - The helpful Feishu guide shows how to upload generated videos via a 'message' tool that needs Feishu app credentials and reads local files. Those Feishu credentials are not declared by the skill — verify how your OpenClaw instance manages Feishu tokens and whether you consent to using them. - Run the tool in a restricted environment (non-root user, sandbox/container) if you are unsure, and test with non-sensitive API keys or limited-scope keys. - Ask the publisher to resolve metadata inconsistencies (declare ARK_API_KEY in requires.env, correct ownerId/slug if needed) before trusting wider use. If you cannot verify the origin or correct metadata, treat the skill as potentially risky and do not run it with production credentials.

Seedance Video Generation

Generate AI videos using ByteDance Seedance models via the Volcengine Ark API.

Prerequisites

The user must set the ARK_API_KEY environment variable. You can set it by running:

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

Base URL: https://ark.cn-beijing.volces.com/api/v3

Supported Models

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

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

Execution (Recommended: Python CLI Tool)

A Python CLI tool is provided at ~/.claude/skills/seedance-video/seedance.py for robust execution with proper error handling, automatic retries, 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/seedance.py create --prompt "小猫对着镜头打哈欠" --wait --download ~/Desktop

# Image-to-video from local file
python3 ~/.claude/skills/seedance-video/seedance.py create --prompt "人物缓缓转头微笑" --image /path/to/photo.jpg --wait --download ~/Desktop

# Image-to-video from URL
python3 ~/.claude/skills/seedance-video/seedance.py create --prompt "风景画面缓缓推进" --image "https://example.com/image.jpg" --wait --download ~/Desktop

# First + last frame
python3 ~/.claude/skills/seedance-video/seedance.py create --prompt "花朵从含苞到盛开" --image first.jpg --last-frame last.jpg --wait --download ~/Desktop

# Reference images (Lite I2V)
python3 ~/.claude/skills/seedance-video/seedance.py create --prompt "[图1]的人物在跳舞" --ref-images ref1.jpg ref2.jpg --model doubao-seedance-1-0-lite-i2v-250219 --wait --download ~/Desktop

# Custom parameters
python3 ~/.claude/skills/seedance-video/seedance.py create --prompt "城市夜景延时摄影" --ratio 21:9 --duration 8 --resolution 1080p --generate-audio false --wait --download ~/Desktop

# Draft mode (cheaper preview)
python3 ~/.claude/skills/seedance-video/seedance.py create --prompt "海浪拍打沙滩" --draft true --wait --download ~/Desktop

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

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

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

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

# Delete/cancel task
python3 ~/.claude/skills/seedance-video/seedance.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.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-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.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-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.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-seedance-1-5-pro-251215",
    "content": [
      {
        "type": "text",
        "text": "YOUR_PROMPT_HERE"
      },
      {
        "type": "image_url",
        "image_url": { "url": "'"$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.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-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 [图1], [图2] in prompt to reference specific images.

TASK_RESULT=$(curl -s -X POST "https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-seedance-1-0-lite-i2v-250219",
    "content": [
      {
        "type": "text",
        "text": "[图1]的人物在跳舞"
      },
      {
        "type": "image_url",
        "image_url": { "url": "REF_IMAGE_URL_1" },
        "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=$(curl -s -X GET "https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks/${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	doubao-seedance-1-5-pro-251215	Model ID to use
ratio	string	16:9 (text2vid) / adaptive (img2vid)	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.cn-beijing.volces.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.cn-beijing.volces.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.cn-beijing.volces.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.cn-beijing.volces.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.

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=$(curl -s -X GET "https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks/${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)

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

# Step 1: Create draft
DRAFT_RESULT=$(curl -s -X POST "https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-seedance-1-5-pro-251215",
    "content": [
      { "type": "text", "text": "YOUR_PROMPT_HERE" }
    ],
    "draft": true,
    "resolution": "480p"
  }')
DRAFT_TASK_ID=$(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.cn-beijing.volces.com/api/v3/contents/generations/tasks" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{
    "model": "doubao-seedance-1-5-pro-251215",
    "content": [
      {
        "type": "draft_task",
        "draft_task": { "id": "'"$DRAFT_TASK_ID"'" }
      }
    ],
    "resolution": "720p"
  }')

Image Requirements

• Formats: jpeg, png, webp, bmp, tiff, gif (1.5 Pro also supports heic, heif)
• Aspect ratio (width/height): between 0.4 and 2.5
• Dimensions: 300-6000 px per side
• Max file size: 30 MB

通过飞书发送视频文件（OpenClaw）

详见 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 (doubao-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.