Nvidia Chrono Edit

Nvidia Chrono Edit

Playground

NVIDIA Chrono Edit is a state-of-the-art image-to-image AI editor that turns photos into stylized edits and retouches with a few clicks. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

ChronoEdit performs edits by reasoning through a short “imagined motion” between the original and the requested change. That temporal reasoning helps keep geometry, lighting, shadows, and contacts consistent in the final image.

Highlights

• Consistency-first edits: pose, lighting, reflections, and shadows stay believable.
• Works with one input image plus a natural-language instruction.
• Reproducible results with seed control; quick iteration for creative teams.
• Production-friendly outputs in JPEG, PNG, or WEBP; optional BASE64 and sync return.

Parameters

• prompt: Describe the change you want, not general style fluff. Example: replace the plastic mug with a clear glass half-filled with tea; keep same angle and morning light.

• image: Source image URL or upload. Use a clean, well-lit photo for best fidelity.

• seed: Integer for determinism. Same prompt + image + seed gives the same result. Use −1 to randomize.

• output_format: jpeg for compact distribution, png for lossless editing, webp for web delivery.

How to Use

1. Upload the source image.
2. Write a concrete prompt that states the target edit and what must be preserved.
3. Set seed if you need reproducibility.
4. Choose output_format.
5. Run and review. If something drifts, tighten the prompt and fix the seed.

Prompting Tips

• Be explicit about conservation: keep camera angle, keep morning sunlight, keep the person’s pose.
• State the edit as a physical change: swap, add, remove, change material, change color.
• If lighting must change, say it clearly; otherwise the model will preserve the original light.
• For faces or text areas, crop tighter to the region before editing for crisper results.

Pricing

Per run: $0.02

Quality Notes

• Input quality sets the ceiling. Soft, noisy, or heavily compressed sources limit realism.
• For large pose or object changes, iterate with fixed seed and small prompt adjustments.

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",
  "seed": -1,
  "output_format": "jpeg"
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/nvidia/chrono-edit" \
  -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 "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 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) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters