Cicadas.ai

AI Video Extender

Extend a video by 6 seconds, with generated audio on the new part. This AI video extender runs Grok Imagine Extend for a flat 143 credits per extension.

  • Grok Imagine Extend
  • 6-second continuation

Continue your video

Choose a 2–15 second MP4, up to 80 MB. Preview stays in your browser until you explicitly upload for a quote. The server checks the actual H.264, H.265 or AV1 video before charging.

Describe what happens next

Sign in for extension and saved results

Your prompt draft can resume after sign-in in this tab. For privacy, choose the source file again after returning.

Grok Imagine Extend adds six seconds to a 2–15 second MP4. You get one MP4: your clip plus the continuation, which comes with generated audio. Check the seam and sound before you use it.

Starter prompts you can edit. Up to 2,000 characters / 4,000 UTF-8 bytes.

About video extension on Cicadas

Upload a 2–15 second MP4, describe what happens next, and this AI video extender adds a 6-second continuation with Grok Imagine Extend. You get one MP4: your source plus the new 6 seconds, which carry their own generated audio track. It costs a flat 143 credits to extend the video, and you see that exact quote before anything is charged.

Why use Cicadas for video extension

Extend your video by 6 seconds, with generated audio

Upload an H.264, H.265 or AV1 MP4 of 2–15 seconds, up to 80 MB, and describe what happens next. Grok Imagine Extend adds a 6-second continuation with its own generated audio; you download source plus continuation as one MP4.

One flat price per video extension

Each extension costs a flat 143 credits, whatever the length of your source. The server shows the exact quote, valid for 5 minutes, and charges only when you confirm.

Find your extended videos under Recent jobs

Results are private MP4s listed under Recent jobs (your latest 20). You can leave while it processes and sign in again later to download it; check the seam before you publish.

How to use video extension

  1. 01

    Sign in and upload a 2–15 second MP4 (H.264, H.265 or AV1), up to 80 MB, that you have the rights to use.

  2. 02

    Describe what happens next, then review the flat 143-credit quote, valid for 5 minutes, and confirm.

  3. 03

    Download the extended MP4 and check the seam, or reopen it later from Recent jobs (your latest 20).

Video extension prompt ideas

Copy one into the prompt box above and adapt it to your shot.

  • “The camera holds steady as the walker keeps moving forward, dust continuing to drift in the same direction.”

  • “The train keeps pulling away at the same speed, its lights fading further down the track.”

  • “The tide keeps rolling in at the same pace, the same gull still circling overhead.”

Video extension FAQ

Tested on Cicadas · reviewed 2026-09-29

Real run on 2026-09-27: a 5.04-second desert shot was continued by Grok Imagine Extend into one 11.04-second 1280×720 MP4 with audio, for the flat 143 credits. Scene, moon and light stayed consistent across the seam, but how smooth a join looks depends on your source clip. Cicadas is not affiliated with xAI.

Updated Sep 29, 2026 · How we test

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