Vidu Q4 Image To Video API Documentation

Vidu Q4 Image To Video API Documentation

Playground

Vidu Q4 Image-to-Video animates a single reference image into high-quality AI video with prompt-guided motion, optional audio, 3-16 second duration, and output resolutions from 540P to 4K for product animation, social content, marketing creatives, cinematic visuals, and production workflows. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

Vidu Q4 Image-to-Video animates a single image into a video of 3 to 16 seconds, up to 4K, with synchronized audio. Describe the motion you want, or leave the prompt out and let the model decide.

Why Choose This?

• Your image as the first frame — The subject, composition and style of the image carry through the clip.
• Sound included — Dialogue, effects and ambience are generated together with the picture, and can be switched off for a silent video.
• Natural camera work — The model can cut between camera positions inside one clip.
• Five resolutions — 540p, 720p, 1080p, 2K and 4K.
• Flexible length — Any whole number of seconds from 3 to 16.

Parameters

The output keeps the framing of the input image; there is no separate aspect-ratio setting.

How to Use

1. Choose an image — Use a sharp image with one clear subject.
2. Write a prompt (optional) — Describe the movement and the camera, for example “the astronaut waves and the camera tilts up”.
3. Pick resolution and duration — Start at 540p or 720p while you explore, then render the final clip at a higher resolution.
4. Run — Submit the request and download the video when it finishes.

Pricing

Pricing is based on the selected resolution and video duration.

The total is the per-second rate for the selected resolution multiplied by duration (whole seconds, 3 to 16). The default of 720p and 5 seconds costs $0.475. Audio generation and the other settings do not change the price.

Best Use Cases

• Product animation — Turn a product photo into a short promotional clip.
• Social content — Add motion to stills for posts, reels and campaigns.
• Character animation — Bring portraits, illustrations and character art to life.
• Campaign variations — Produce several video takes from the same key visual.
• Concept testing — Try out motion and camera ideas from a single frame.

Pro Tips

• Describe movement and camera direction; the image already shows what is in the frame.
• Keep the action small enough to finish within the chosen duration.
• Turn on enable_prompt_expansion for short prompts, and leave it off when you want the model to follow your wording closely.
• Set generate_audio to false if you plan to add your own soundtrack.
• A fixed seed makes variations easier to compare, but identical output is not guaranteed.

Related Models

• Vidu Q4 Reference-to-Video - Keep characters, products and style consistent from up to 15 reference images, with optional voice references.

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",
  "resolution": "720p",
  "duration": 5,
  "enable_prompt_expansion": false,
  "generate_audio": true
}
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/vidu/q4/image-to-video" \
  -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

Response Parameters

Result Request Parameters

Result Response Parameters