Pixverse Pixverse V6 Extend API Documentation

Pixverse Pixverse V6 Extend API Documentation

Playground

PixVerse V6 Extend continues and enhances existing video content by analyzing the ending segment and generating new frames forward. Supports 360p to 1080p resolutions, 1-15 second extension duration, optional audio generation, and multiple styles. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

PixVerse V6 Video Extend continues an existing video clip with new AI-generated footage, seamlessly picking up where the original ends. Describe where the scene should go next — the model generates a natural, motion-consistent extension with optional style control, negative prompting, and synchronized audio.

• Need to generate from scratch? Try PixVerse V6 Text-to-Video

Why Choose This?

• Seamless video continuation Extends your existing clip with new AI-generated footage that matches the original motion, style, and scene context.

• Prompt-guided extension Describe what should happen next — direct the action, camera movement, and atmosphere of the extended segment.

• Style control Apply a specific visual style to the extension for creative or consistent branded output.

• Optional audio generation Enable generate_audio_switch to produce synchronized ambient sound alongside the extended video.

• Negative prompt support Specify what to avoid in the extension for more precise control over the output.

• Multiple resolution tiers Generate extensions at 360p, 540p, 720p, or 1080p to match your delivery requirements.

Parameters

How to Use

1. Upload your video — provide the source clip to extend via URL or drag-and-drop.
2. Write your prompt — describe what should happen next in the scene.
3. Select resolution — 360p for drafts, 720p for standard output, 1080p for final production.
4. Set duration — choose how many seconds to extend the video by.
5. Enable audio (optional) — check generate_audio_switch to generate synchronized sound.
6. Add negative prompt (optional) — specify elements you want to avoid in the extension.
7. Set style (optional) — apply a specific visual style to the extended footage.
8. Set seed (optional) — fix the seed to reproduce a specific result in future runs.
9. Submit — generate, preview, and download your extended video.

Pricing

Billing Rules

• Billing is calculated per second of extension generated
• Audio generation increases cost per second at each resolution tier
• Examples: 10s extension at 720p (no audio) = $0.45 — 10s at 1080p (no audio) = $0.90

Best Use Cases

• Short Film & Narrative — Extend key scenes to develop story beats without reshooting.
• Social Media Content — Lengthen clips to hit optimal duration for Reels, TikTok, and Shorts.
• Marketing & Advertising — Extend product or campaign videos to fill longer ad slots.
• Creative Exploration — Explore alternate continuations of the same source clip with different prompts.
• Loop & Ambient Video — Generate extended atmospheric footage from a short seed clip.

Pro Tips

• Be specific about what should happen next — camera movement, subject action, and environmental changes.
• Use negative_prompt to prevent the extension from repeating or contradicting the source footage.
• Use 360p at short durations to test your prompt direction before committing to a high-resolution extension.
• Fix the seed once you find a direction you like to iterate consistently across different durations.

Notes

• Both prompt and video are required fields; all other parameters are optional.
• Ensure video URLs are publicly accessible if using a link rather than a direct upload.
• Please follow PixVerse’s content usage policies when crafting prompts.

Related Models

• PixVerse V6 Text-to-Video — Generate video from text prompts from scratch.
• PixVerse V6 Image-to-Video — Animate a reference image into a cinematic video clip.

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",
  "video": "https://interactive-examples.mdn.mozilla.net/media/cc0-videos/flower.mp4",
  "resolution": "720p",
  "duration": 5,
  "generate_audio_switch": false
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/pixverse/pixverse-v6/extend" \
  -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