AI Video Extender
Drag or Click to upload a video
Upload MP4/WEBM/AVI/MOV/WMV videos up to 50MB
Sample Video
(The Created Video results will appear here)
What is Seedream 4.0 AI Video Extender?
Seedream 4.0 AI Video Extender is a next-generation video length-extension system powered by the Seedream 4.0 engine. Built with advanced model integrations—including the Wan 2.5 model from Alibaba—this AI Video Extender expands short clips into longer, seamless footage while preserving motion flow, scene style, lighting consistency, and overall visual quality. It generates extended videos in 480p, 720p, and 1080p, offering creators, marketers, and businesses a fast, affordable, and high-fidelity solution for intelligent video expansion.
How to Use Seedream 4.0 AI Video Extender
Extend your footage effortlessly using Seedream 4.0’s powerful AI Video Extender. Just follow these simple steps:
Upload Your Base Video
Start by uploading the original video clip you want to extend. Seedream 4.0 AI analyzes motion, style, and scene composition before generating extended footage.
Add Audio & Adjust Settings
Optionally upload custom audio (voice or music), or let Seedream 4.0 auto-generate synchronized audio. Select your target duration (3–10 seconds) and choose output resolution—480p, 720p, or 1080p.
Generate and Download
Submit your request and let Seedream 4.0 AI Video Extender produce a smooth, coherent, and natural video extension. Once ready, preview the result and download your extended clip for any project.
Seedream 4.0 AI Video Extender — Frequently Asked Questions
Everything you need to know about Seedream 4.0 AI Video Extender, our advanced system for seamless and high-quality video expansion.
What is the Seedream 4.0 AI Video Extender?
It is an intelligent video length-extension tool powered by Seedream 4.0 AI. While it integrates underlying models such as Wan 2.5, the full extension workflow—including motion continuity, style preservation, audio sync, and quality optimization—is exclusively enhanced by Seedream 4.0’s proprietary system.
What makes Seedream 4.0 AI Video Extender special?
It offers smooth scene continuation, flexible duration control (3–10 seconds), one-pass audio-video synchronization, multilingual prompting, optional custom audio upload, and fast, consistent, cost-effective generation. Its quality, motion stability, and coherence exceed traditional editing methods.
How does pricing work for AI Video Extender?
Seedream 4.0 uses a credit-based pricing system. Longer durations and higher resolutions require more credits. 480p uses the fewest credits, while 720p and 1080p require more. Because the system is optimized for efficiency, users benefit from high-quality output at an affordable cost.
What are common use cases for AI Video Extender?
Popular use cases include social media content, marketing videos, storytelling scenes, ad variations, product showcases, training materials, multilingual corporate content, and expanding short clips into complete segments without reshooting.
Why choose Seedream 4.0 instead of other video extension tools?
Seedream 4.0 enhances base models like Wan 2.5 with proprietary AI technologies to deliver smoother motion, better scene consistency, smarter audio sync, and more stable high-resolution outputs. It provides a faster, more reliable, and more creative-friendly video extension experience.