Bytedance Seedance V1 Lite I2V 1080p API Documentation

Bytedance Seedance V1 Lite I2V 1080p API Documentation

Playground

Seedance Lite creates coherent multi-shot image-to-video clips in 1080p with smooth, stable motion and accurate prompt following. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

> Notice — Service Stability > > The Seedance 1.0 family is being retired or has already been retired by its original provider. Until it is fully removed, the service is unstable: generations may fall back to alternative models without notice, results can differ from what this model used to produce, and the service can be temporarily unavailable. > > If you need an equally capable, stable alternative, we recommend Seedance 2: bytedance/seedance-2.0/image-to-video.

Seedance V1 Lite Image-to-Video 1080p is Full HD image-to-video generation model that transforms static images into stunning 1080p videos. With optional last-frame control, flexible durations up to 12 seconds, and multiple aspect ratios, create cinematic animations from any image.

Why It Stands Out

• Full HD 1080p output: Generate high-resolution videos with exceptional clarity.
• First and last frame control: Optionally specify an ending image for precise animation control.
• Prompt Enhancer: Built-in AI-powered prompt optimization for better results.
• Flexible duration: Generate videos from 2 to 12 seconds long.
• Multiple aspect ratios: Wide range from ultrawide 21:9 to vertical 9:16.
• Camera control: Option to fix camera position for stable shots.
• Reproducibility: Use the seed parameter to recreate exact results.

Parameters

Supported Aspect Ratios

How to Use

1. Upload your source image — drag and drop a file or paste a public URL.
2. Write a prompt (optional) — describe the motion you want. Use the Prompt Enhancer for AI-assisted optimization.
3. Upload a last image (optional) — specify an ending frame for controlled animation.
4. Set duration — choose video length from 2 to 12 seconds.
5. Select aspect ratio — choose the format that fits your platform.
6. Enable camera_fixed (optional) — check for stable, static camera shots.
7. Click Run and wait for your video to generate.
8. Preview and download the result.

Best Use Cases

• Artwork Animation — Bring paintings, illustrations, and art to life.
• Social Media Content — Create platform-optimized videos for any channel.
• Marketing & Advertising — Animate product images and hero shots.
• Creative Transitions — Use first/last frame control for smooth morphing effects.
• Music Videos — Generate dynamic visuals from album art.

Pricing

Billing Rules

• Billed per 5 seconds at $0.45
• Minimum duration: 2 seconds
• Maximum duration: 12 seconds

Pro Tips for Best Quality

• Use high-resolution, well-lit source images for optimal results.
• Use last_image for controlled transitions between two specific frames.
• Enable camera_fixed for professional-looking static shots.
• Choose 21:9 for cinematic content, 9:16 for mobile-first platforms.
• Start with shorter durations to test concepts, then extend for final versions.

Notes

• Ensure uploaded image URLs are publicly accessible.
• Processing time varies based on duration and current queue load.
• Please ensure your prompts comply with content guidelines.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "image": "https://interactive-examples.mdn.mozilla.net/media/cc0-images/painted-hand-298-332.jpg",
  "duration": 5,
  "aspect_ratio": "21:9",
  "camera_fixed": false
}
JSON
)

# 1. Submit the prediction once. Never retry this request automatically:
# a retry after an unclear failure can create a second, billed task.
CHECK='The task may already exist. Check History or the predictions list before submitting again.'
if ! SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  --connect-timeout 10 --max-time 60 \
  -X POST "https://api.wavespeed.ai/api/v3/bytedance/seedance-v1-lite-i2v-1080p" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}"); then
  printf 'Submit failed. %s\n' "${CHECK}" >&2
  exit 1
fi

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id. %s\n' "${CHECK}" >&2
  exit 1
fi
RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"

# 2. Poll until the prediction reaches a final status.
BODY_FILE=$(mktemp)
trap 'rm -f "${BODY_FILE}"' EXIT
while true; do
  # Transient errors (429, 5xx) are retried, honoring Retry-After.
  HTTP_CODE=$(curl --silent --show-error --fail-with-body \
    --connect-timeout 10 --max-time 60 --retry 5 --retry-delay 2 \
    --output "${BODY_FILE}" --write-out '%{http_code}' \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}" || true)
  case "${HTTP_CODE}" in
    2??) ;;
    000|429|5??)  # dropped connection or temporary error: keep polling
      printf 'Task %s: HTTP %s, polling again in 10s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      sleep 10; continue ;;
    *) printf 'Task %s: HTTP %s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      cat "${BODY_FILE}" >&2; exit 1 ;;
  esac
  RESULT=$(jq 'if type == "object" and has("data") then .data else . end' "${BODY_FILE}")
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout|deleted)
      printf 'Task %s ended with status %s\n' "${PREDICTION_ID}" "${STATUS}" >&2
      printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    *) sleep 2 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Every model also accepts the global request options enable_sync_mode and enable_base64_output; see their pages for details.

Response Parameters

Result Request Parameters

Result Response Parameters