AI Video Extender — Extend, Continue & Lengthen Videos Online

AI video extender to extend and continue any video from a selected keyframe. Upload a video, pick a frame on the interactive timeline, add a prompt, and generate what happens next. Chain multiple extensions to create longer video sequences. 9 AI models: Kling 3.0, Veo 3.1, Seedance 2.0, Grok Imagine Video, PixVerse 5.6, Hailuo 2.3, LTX 2.3, Wan 2.5, Wan 2.6.

AI Edit's video extender lets you continue any video beyond its original length. Upload a video clip, and the interactive timeline extracts keyframes so you can select exactly which moment to extend from. Write a prompt to guide what happens next — describe new actions, camera movements, or scene changes — and the AI generates a seamless continuation. You can set start and end frames, adjust duration, resolution, and aspect ratio, rotate frames, and chain multiple extensions to build longer narratives from short clips. Long videos are automatically chunked for processing. The video extender works with both AI-generated videos and real footage, making it ideal for filmmakers, content creators, and social media producers who need to lengthen clips without reshooting. Choose from 9 AI video models — Kling 3.0 for cinematic realism, Veo 3.1 for high-fidelity detail, Seedance 2.0 for character dance and motion, Grok Imagine Video for creative stylization, PixVerse 5.6 for versatile motion, Hailuo 2.3 for smooth high-quality output, LTX 2.3 for fast iteration, and Wan 2.5 and Wan 2.6 for flexible video continuation. Each model offers different duration, resolution, and aspect ratio options, and the interface dynamically adjusts available settings based on your selection. Whether you need to extend a product demo, lengthen a social media clip, or build a multi-scene narrative, the AI video extender handles the entire workflow in your browser.

Features:
- Extend videos from any selected keyframe on the interactive timeline
- Chain multiple AI extensions to build longer video sequences
- Start frame and end frame selection from the video timeline
- AI-powered Generate Prompt to describe continuation from the selected frame
- 9 AI video models: Kling 3.0, Veo 3.1, Seedance 2.0, Grok Imagine Video, PixVerse 5.6, Hailuo 2.3, LTX 2.3, Wan 2.5, Wan 2.6
- Configurable duration, resolution, and aspect ratio per model
- Frame rotation at 0°, 90°, 180°, and 270° before extending
- Automatic video chunking for long uploads
- Keyframe extraction with visual timeline scrubber
- Select frames from chat history for start or end frame input
- Model-specific display parameters and settings modal
- Works with both AI-generated and real-world video footage
- Mobile-optimized two-step UI: select video, then prompt and generate
- Download extended video clips for editing or sharing

How to use:
1. Upload a video file or load one from your chat history
2. Browse the interactive timeline and select the keyframe to extend from
3. Optionally set a start frame and an end frame for the extension range
4. Write a prompt describing what should happen next, or use Generate Prompt AI
5. Choose an AI model, duration, resolution, and aspect ratio
6. Click Continue Video and wait for AI processing — download or chain another extension

Use Cases:
- Lengthen Short Clips: Extend a 5-second AI-generated video into a 15- or 30-second clip by chaining multiple continuations from successive keyframes.
- Add New Scenes to Existing Footage: Upload a real video, select the last frame, describe a new scene in the prompt, and the AI generates a natural continuation that matches the visual style.
- Create Longer Social Media Videos: Turn short clips into longer vertical or landscape videos for TikTok, Instagram Reels, YouTube Shorts, and other social platforms.
- Extend AI-Generated Videos: Continue videos made with AI Edit's video generator. Pick a keyframe from the generated clip and extend the story, action, or camera movement.
- Film Pre-visualization: Directors and filmmakers can extend storyboard animations and pre-viz clips to test longer sequences before committing to a full shoot.
- Build Video Narratives: Chain multiple continuations with different prompts to create multi-scene video stories — each extension starts where the previous one left off.
- Fix Abrupt Endings: When a video generation ends too soon, use the video extender to continue the motion and bring the clip to a natural conclusion.
- Product Demo Extensions: Extend product showcase videos with additional angles, features, or use-case demonstrations without re-recording footage.
- Music Video Sequences: Extend dance or performance clips frame by frame to match song lengths, chaining continuations with motion-consistent AI output.
- Game Cinematics and Trailers: Extend short cinematic renders into longer trailer sequences by continuing from keyframes with new action prompts.

FAQ:
Q: What is an AI video extender?
A: An AI video extender uses artificial intelligence to generate new frames that continue a video beyond its original length. You select a keyframe from the interactive timeline, describe what happens next in a text prompt, and the AI creates a seamless continuation that matches the visual style, motion, and lighting of the original clip. Unlike traditional video editing, no source footage is needed for the extended portion — the AI generates entirely new content.

Q: How does AI video extension work?
A: Upload a video and the tool extracts keyframes into an interactive timeline. Select the frame you want to extend from, write a text prompt describing the next scene or action, choose one of 9 AI models, configure duration and resolution, and click Continue Video. The AI analyzes the selected frame's composition, color palette, and motion trajectory, then generates new frames that naturally follow. You can preview the result and chain additional extensions.

Q: Which AI models can extend videos?
A: AI Edit offers 9 models for video extension: Kling 3.0 for cinematic realism, Veo 3.1 for high-fidelity detail, Seedance 2.0 for character dance and motion, Grok Imagine Video for creative stylization, PixVerse 5.6 for versatile motion, Hailuo 2.3 for smooth high-quality output, LTX 2.3 for fast iteration, Wan 2.5 for flexible continuation, and Wan 2.6 for the latest generation quality.

Q: Can I extend a video multiple times?
A: Yes. Chain multiple extensions by continuing from the last frame of each generated clip. Each extension adds several seconds, so you can build progressively longer videos by repeating the process.

Q: How long can I make a video with AI extension?
A: There is no hard limit on total length. Each extension generates a clip of several seconds (duration depends on the model). You can chain as many extensions as you like to build longer sequences.

Q: Can I extend real videos or only AI-generated ones?
A: Both. Upload any video — recorded on a phone, captured by a drone, exported from a video editor, or generated by AI — and extend it from any keyframe. The AI adapts to the visual style, color grading, and motion characteristics of the source footage to produce a consistent continuation.

Q: What video formats can I upload?
A: The video extender accepts standard video formats including MP4 and other common browser-supported formats. There is no strict file size limit — long videos are automatically chunked into smaller segments for keyframe extraction and processing, so you can work with footage of any length.

Q: Can I choose which frame to extend from?
A: Yes. The interactive timeline extracts keyframes from your video. Click any keyframe to select it as the continuation point, or use the slider to scrub through the timeline.

Q: What are start frame and end frame?
A: Start frame is the keyframe from which the AI begins generating new video. End frame (optional) provides a target visual state the AI should work toward, giving you control over the direction of the extension.

Q: Can I set start and end frames from different sources?
A: Yes. You can select start and end frames from the video timeline, upload them as images, or choose frames from your AI Edit chat history.

Q: What does Generate Prompt AI do?
A: Generate Prompt AI analyzes the selected keyframe and automatically writes a descriptive prompt suggesting what could happen next in the video. You can edit the generated prompt before extending.

Q: Can I rotate the frame before extending?
A: Yes. The video extender supports frame rotation at 0°, 90°, 180°, and 270°, which is useful for correcting orientation before the AI generates the continuation.

Q: What happens with long videos?
A: Long videos are automatically chunked into processable segments. A chunking notification shows progress as the video is split and keyframes are extracted from each segment.

Q: What resolutions are available for video extension?
A: Resolution options depend on the selected AI model. Common options include 720p and 1080p. The model selector shows available resolutions for each model.

Q: What aspect ratios can I use?
A: Aspect ratio options vary by model. Common options include landscape, portrait, and square formats. The interface shows which aspect ratios are supported by the selected model.

Q: What duration options are available?
A: Duration options depend on the AI model. Typical extensions range from a few seconds per generation. You can chain multiple extensions to reach any total length.

Q: Is the AI video extender free?
A: AI Edit uses a credit-based system. Video extension consumes credits based on the model, duration, and resolution you select. Purchase credits through subscription plans or top-up packs.

Q: Do I need to install software to extend videos?
A: No. The AI video extender runs entirely in your browser. Upload a video, select a frame, and generate the extension online — no downloads or installations required.

Q: Can I use the video extender on mobile?
A: Yes. The mobile-optimized interface uses a two-step flow: first select and upload your video, then enter a prompt and generate the extension.

Q: Which model is best for realistic video extensions?
A: Kling 3.0 and Veo 3.1 produce highly realistic extensions. Hailuo 2.3 delivers high-fidelity motion. Try multiple models to find the best realism for your footage.

Q: Which model is fastest for extending videos?
A: LTX 2.3 is optimized for speed and is ideal for quick iterations. Use it to prototype extensions before switching to a higher-fidelity model for the final result.

Q: Which model is best for character motion?
A: Seedance 2.0 excels at smooth character animation, dance sequences, and dynamic body motion. It is a strong choice when extending videos with people or characters in motion.

Q: Can I describe camera movements in the prompt?
A: Yes. Include camera directions in your prompt — pan left, zoom in, dolly forward, tracking shot, crane up, aerial shot, slow motion, time-lapse, etc. — and the AI will incorporate those movements into the extended video. Combining camera motion with scene descriptions produces cinematic results.

Q: Does the extension match the original video style?
A: Yes. The AI analyzes the selected keyframe and generates continuation that matches the color palette, lighting, motion style, camera angle, and visual characteristics of the source video. The result blends seamlessly with the original footage, maintaining consistency in subject appearance, environment, and overall aesthetic.

Q: Can I select frames from my chat history?
A: Yes. When setting start or end frames, choose "Select from chat" to use images from your previous AI Edit conversations and generations as input frames.

Q: What is video continuation vs. video extension?
A: They are the same concept. Video continuation (or video extension) means generating new frames that continue a video beyond its original end point. The terms are used interchangeably.

Q: Can I change the AI model between chained extensions?
A: Yes. Each extension is independent, so you can switch models between chains. For example, use Kling 3.0 for a realistic opening, then Seedance 2.0 for a dance sequence.

Q: How do model display parameters work?
A: Some models have additional settings accessible through the model settings modal. These parameters let you fine-tune the generation behavior beyond the standard duration, resolution, and aspect ratio controls.

Q: Can I extend a video generated from an image?
A: Yes. Generate a video from an image using AI Edit's video generator, then open it in the video extender to continue the clip with additional frames and scenes.

Q: What keyboard shortcuts are available?
A: The video extender supports keyboard shortcuts for common actions, including Cmd+Enter (or Ctrl+Enter) to submit a generation, making it faster to navigate the timeline, submit video extensions, and manage the interface without reaching for the mouse.

Q: How do I extend a video for YouTube or TikTok?
A: Upload your clip, select the last frame on the timeline, set the aspect ratio to landscape for YouTube or portrait for TikTok and Reels, write a prompt describing the next scene, and generate the extension. Chain multiple extensions until the video reaches the desired length for your platform.

Use this tool: https://aiedit.com/video-continue
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Gallery examples: https://aiedit.com/gallery
More info: https://aiedit.com/llms.txt