Upload a short clip, choose how long it continues, optionally keep generating audio, and describe what happens next.

Tutorial Video

Generator examples

Best ai video extender — one upload, one longer clip back

The best ai video extender on Voor is not a timeline editor — it is a continuation model wired to your clip's last frame. Upload MP4 or WebM, pick a continuation preset, describe what happens next, and the best ai video extender returns original plus new footage merged into a single file. Watch the short source clip sync with the extended output until the split — then the tail continues alone.

  • Last frame locked
  • Sync until split
  • One merged MP4
Source clip
Extended clip
Short drone B-roll (~3s) extended to a longer merged clip — slow constant glide joins cleaner than fast sprint motion.

Four best ai video extender habits that save credits

Trim to a clean last frame

The best ai video extender reads your final frame literally. Pause one frame before motion blur eats the subject — that single frame anchors the whole continuation.

Describe motion, not identity

Identity is already in the upload. The best ai video extender preset handles match language; you only write what happens next in one short sentence.

Chain for length

Need a longer story? Download the merged output and run the best ai video extender again. Each pass adds another segment with the same join logic.

Roll twice, keep the quiet take

Continuations sometimes smear hands or flicker sky. Generate two best ai video extender passes and keep the one where the subject weight feels heaviest.

Which model actually extends the uploaded clip?

The uploader has three real continuation routes. FLUX 3 extend-video (and its draft) can generate continuation audio. Grok Imagine Video Extension remains the silent last-frame continuer. Gemini Omni 1.1 Flash and Wan 3.0 are adjacent edit or long-shot tools, not this merge.

Default · audio-aware continuation

FLUX 3 extend-video

The upload flow on this page defaults to FLUX 3 extend-video: source MP4 under 15 seconds and 50 MB, continuation 5–20 seconds, optional generate_audio (on by default). Visual continuation keeps characters, motion, scene, camera, and style; audio-aware continuation can add dialogue, ambience, and effects in the new frames.

Open the FLUX 3 family page →

Cheaper preview of the same family

FLUX 3 extend-video draft

Same continuation contract at draft quality, still with generate_audio. Use it to approve the next beat before spending the full-quality pass.

See FLUX 3 draft vs full →

Silent last-frame continuation

Grok Imagine Video Extension

Grok Imagine Video Extension continues a 2–15 second source for 2–10 silent seconds. Use it when you will add sound in an editor, or open Continue with sound on this page to switch to FLUX 3 extend-video.

See the Grok extension workflow →

Reference-led edit

Gemini Omni 1.1 Flash

Gemini can use image and video references for a connected edit and can produce audio, but it is not the automatic merged extender used by this uploader. Use it when a new shot or bounded edit is acceptable.

Compare Gemini with H3 Max →

Long standalone generation

Wan 3.0

Wan is useful when the goal is one longer generated shot from text, images, or references. Its route can make up to 30 seconds, but it does not automatically merge onto the source clip in this extender workflow.

Compare H3 Max with Wan 3.0 →

14 best ai video extender prompts that actually join clean

Pick a continuation preset above, paste one line as your variable prompt, generate. Each scenario assumes a stable camera — the best ai video extender preset already carries match language.

  • Runner reaches the frame edge — best ai video extender continues the sprint in the same direction with matched motion blur.

  • Product demo hand mid-gesture — best ai video extender finishes the pour without the bottle jumping position.

  • Interview subject mid-sentence — best ai video extender holds the same head angle while they complete the thought.

  • Drone shot approaching a ridge — best ai video extender pushes forward with consistent altitude and grade.

  • Pet clip ending on a tail wag — best ai video extender adds two more wags at the same cadence.

  • Cooking clip knife mid-chop — best ai video extender completes the chop cycle, steam stays consistent.

  • Fashion walk ending on heel strike — best ai video extender adds one more stride down the same runway line.

  • Time-lapse cloud stack — best ai video extender extends the drift without resetting sky color.

  • UGC testimonial ending on a smile — best ai video extender holds eye contact while the smile deepens naturally.

  • Gameplay clip ending on a jump — best ai video extender lands the character with the same camera follow.

  • Nature macro dew drop — best ai video extender continues the slow roll along the leaf vein.

  • Logo sting ending on hold — best ai video extender adds a subtle shimmer without moving the mark.

  • Street interview ending on a laugh — best ai video extender captures the exhale beat before cut.

  • ASMR pour ending mid-stream — best ai video extender completes the pour into the glass with matched liquid physics.

Why the best ai video extender beats stretching in an editor

Speed-ramping or freeze-frame padding makes clips longer but not richer — viewers feel the hold. The best ai video extender generates new pixels that move forward in time, so a five-second UGC take can become eight seconds of real action without a visible loop.

Continuation models fail when the last frame lies. If your clip ends mid-motion-blur, the best ai video extender invents a smear. Trim one beat earlier, re-upload, and the join tightens. That single edit is the difference between “AI glitch” and “did they shoot more?”

Model choice is now a control on this page. FLUX 3 extend-video is the default because its schema takes a source video and can generate audio with the continuation. Grok Imagine Video Extension stays available as Silent continuation. Gemini Omni 1.1 Flash is a reference-led edit option, while Wan 3.0 is a long-shot generator; neither is presented here as a drop-in merged extender.

Need a Grok-style extend after xAI removed the button? See Grok extend replacement. Building a longer story from sketches? Draw to Video animates still art; the best ai video extender continues video you already have. For pure continuation wording, AI Video Continuer is the sibling page with chain-first presets.

If a separate generated shot is acceptable, use the real same-prompt Gemini Omni 1.1 Flash vs H3 Max test for fast camera and subject decisions, or compare Gemini Omni 1.1 Flash vs Wan 3.0 when a more restrained edit or a richer long shot matters more than an automatic seam.

Archive approved best ai video extender prompt clauses in a shared doc — motion sentences reuse across SKU videos while preset swaps per placement. Version filenames with date so editors trace which extend pass landed on the timeline.

Batch Monday UGC: upload five sources, run best ai video extender Social tail preset, review joins on headphones before client delivery. One sharp last frame per clip beats re-uploading motion-blur endings.

Version exports with date and preset name — editors trace which extend pass landed when clients ask for a rerun on the same source clip.

Best ai video extender — FAQ

What is the best AI video extender on Voor?

The AI video extender on this page defaults to FLUX 3 extend-video: upload an MP4 under 15 seconds and 50 MB, request a 5–20 second continuation, and optionally generate audio with the new frames. Grok Imagine Video Extension remains available as Silent continuation (2–10 silent seconds from a 2–15 second source). The generator shows the Voor credit estimate before each run.

Can I extend AI video with sound?

Yes — choose Continue with sound (FLUX 3 extend-video) and leave Generate continuation audio checked. That is audio-aware continuation: dialogue, ambience, and effects can be written into the next-beat prompt. Silent continuation (Grok) does not generate audio; do not use it if you need sound in the tail.

How does the AI video extender avoid a visible seam?

The model reads your final frames and continues motion from there. Pause one frame before motion blur eats the subject. Describe only what happens next. Visual continuation aims to keep characters, motion, scene, camera, and style; it is still a generation, so roll twice when the join matters.

Can the AI video extender make a five-second clip into fifteen seconds?

Chain passes. Run the AI video extender, download the merged result, upload it again. FLUX 3 continuations are 5–20 seconds each; Grok continuations are 2–10 seconds. Source clips for FLUX 3 must stay under 15 seconds, so trim long files before the next pass.

AI video extender vs AI video continuer?

Same family of continuation. This AI video extender is the commercial hub and now routes audio-aware FLUX 3 by default. AI Video Continuer keeps story-beat presets and the silent Grok route — use it when you think in narrative continues and do not need generated sound.

Is the AI video extender free to try?

New accounts receive 50 welcome credits; the generator shows the credit cost before you run it. FLUX 3 full-quality continuation costs more per second than the draft endpoint or silent Grok.

What file formats does the AI video extender accept?

MP4 and WebM. FLUX 3 extend-video: under 50 MB and under 15 seconds. Grok: MP4, 2–15 seconds, H.264 / HEVC / AV1. The page returns a continuation file you can download; trim oversized sources before upload.

Does the AI video extender work for vertical TikTok clips?

Yes. FLUX 3 extend-video publishes 9:16 (and auto). Upload 9:16 source and keep the next-beat prompt simple so the continuation does not pan into empty space.

Continue video with AI if I only have a still?

Use image-to-video, not this AI video extender. Extender routes require a source video. Image-to-video starts from one frame; extender continues motion you already have.

Extend the clip you already have

Upload, pick a best ai video extender preset, describe the next beat. The join happens automatically — you get one longer MP4 back.

Try the best ai video extender