Bytedance Seedance 2.0 Fast Image To Video Turbo API Documentation

Bytedance Seedance 2.0 Fast Image To Video Turbo API Documentation

Playground

Seedance 2.0 Fast (Image-to-Video Turbo) generates cinematic 720p/1080p videos from reference images using speed-optimized inference —the fastest and most affordable Seedance image-to-video option with native audio-visual synchronization and director-level control.

Features

Seedance 2.0 Fast Image-to-Video Turbo is the fastest and most affordable Seedance image-to-video option — combining speed-optimized inference to deliver 720p and 1080p cinematic videos from reference images with native audio-visual synchronization.

Key Features

• Fastest Seedance image-to-video Speed-optimized inference for maximum throughput.

• Affordable HD output Starting at $0.60 per 5 seconds at 720p.

• Image-faithful generation Preserves the reference image’s subject identity, composition, and style.

• Native audio-visual synchronization Generates video with synchronized audio in a single pass.

• Director-level control Camera movement, lighting, and character performance controlled through prompts.

Parameters

Writing Effective Prompts

The input image sets the first frame — your prompt directs what happens from there. The clearer the motion and camera direction, the better the result.

1. Start from the frame

Describe the action that begins from your image: what the subject does, where it goes, how the camera moves. Don’t re-describe what’s already visible in the image — build on it.

The woman in the photo turns from the window and walks toward the camera; slow push-in, warm interior light.

2. Shot-by-shot timeline

For longer clips, break the motion into timed segments (1-second granularity), continuous, no gaps.

> 0-2s: She turns from the window, a faint smile forming. Camera holds. > 2-5s: She walks toward the lens and stops mid-frame; slow push-in, shallow focus. > 5-8s: She glances off-screen as light shifts from warm to cool. Handheld drift.

3. Consistency notes

Lock the look for the whole clip: camera style, lighting, palette, atmosphere, audio.

Camera language

Write these directly; the model understands them:

• Shot size — extreme wide, wide, medium, medium close-up, close-up
• Movement — push in, pull out, pan, track, follow, orbit, tilt up, handheld shake
• Angle — low angle, overhead, eye-level, first-person
• Techniques — one-shot / long take, dolly zoom, bullet time, speed ramp

For a niche term, add a plain-language gloss: “rack focus: the sharp foreground softens as the background comes into focus.”

Referencing uploaded assets

When you attach images, videos, or audio, bind each one explicitly in the prompt by its upload order — @image1, @video1, @audio1 — and say what it’s for. Don’t rely on labels drawn inside the image itself.

• “The knight in @image1 walks through the castle in @image2.”
• “Refer to @video1 for the camera movement only; keep its shot order.”
• “@image1 and @image2 are Character 1, voiced by @audio1.”

When a reference is already accurate, just point to it — no need to re-describe it in detail.

Negative control

Positive descriptions work best, but you can suppress subtitles and audio:

• “No subtitles.”
• “No BGM — ambient and action sounds only.”
• “No audio.”

Weak vs. strong

Pricing

Billing Rules

• 720p rate: $0.60 per 5 seconds
• 1080p rate: $0.65 per 5 seconds
• Duration range: 4-15 seconds (continuous)

Best Use Cases

• Maximum Speed — Fastest possible Seedance image-to-video generation at HD resolution.
• High-Volume Production — Most cost-effective HD generation for large content libraries.
• Product Animation — Fast turnaround on product shot animations in HD.
• A/B Testing — Generate many variations from the same reference image efficiently.

Pro Tips

• Use this for maximum speed and lowest cost at HD resolution.
• Upload high-quality reference images for best subject preservation.
• Switch to standard Seedance 2.0 for final production quality.
• Start with 5s to iterate, then extend once the look is right.

Notes

• Native audio generation included.
• Resolution options: 720p and 1080p only (turbo mode with speed-optimized inference).
• Duration range: 4-15 seconds (continuous).
• Aspect ratio follows the input image composition.

Related Models

• Seedance 2.0 Fast Image-to-Video — Speed-optimized generation.
• Seedance 2.0 Image-to-Video Turbo — Standard inference turbo mode.
• Seedance 2.0 Image-to-Video — Highest quality generation.

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'
{
  "prompt": "A cinematic ocean wave at sunrise, highly detailed",
  "image": "https://interactive-examples.mdn.mozilla.net/media/cc0-images/painted-hand-298-332.jpg",
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "duration": 5,
  "enable_web_search": false,
  "generate_audio": true
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/bytedance/seedance-2.0-fast/image-to-video-turbo" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

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 "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"

# 2. Poll until the prediction finishes.
while true; do
  RESPONSE=$(curl --silent --show-error --fail-with-body \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}")
  RESULT=$(printf '%s' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

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

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters