AI Video Extender
MP4 or MOV, 2–30 seconds, up to 200MB. Short edge 300–6000px. This is the clip to extend (@video1). Total duration with reference videos must be ≤30s. Output aspect ratio follows the source.
Forward continues after the last frame; backward invents what happened before.
Total length of the extended result (4–30 seconds). Must be longer than the source.
Up to 30 style or subject reference images. Mention them as @image1, @image2, …
Up to 9 extra clips for motion/camera reference. Each 2–30s; combined with the source video, total duration ≤30s.
Up to 10 clips (mp3/wav), each 2–30s, total ≤30s. Use for BGM, SFX, or voice reference.
When enabled, the extended video includes generated audio.
Describe what should happen in the extended portion. Direction is prepended automatically (Extend @video1 forward/backward).
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Upload a source video, choose direction and length, then click Extend Video
Extend Videos with AI
Continue the action before or after your clip — no timeline editing required
Forward or Backward
Forward continues after the last frame; backward invents what came before the first frame.
4–30s or Auto
Set total output length (must be longer than the source), or choose Auto to let the model decide.
Multimodal References
Optional: up to 30 images, extra reference videos (total with source ≤30s), and up to 10 audio clips.
Synced Audio
Generate synchronized audio with the extended clip at no extra charge.