How to edit video with ai
Step-by-step guide to editing video with ai on Flixly. Covers prompt-based generation, reference clips, lip sync and caption tools with specific model examples.
TL;DR
Edit video with ai by starting in Text to Video, refining with Video to Video or Lip Sync, then adding captions. Models such as Seedance 2.0, Kling 3.0 and Veo 3.1 deliver 5-10 second clips at 1080p. Export as MP4 and iterate inside the same dashboard.
Start with text prompts for quick clips
Edit video with ai begins when you type a description into the Text to Video tool. Seedance 2.0 accepts prompts up to 240 characters and returns a 5-second 1080p clip at 24 fps. You then load that clip into Video to Video to change style or camera angle without rebuilding from scratch.
Kling 3.0 handles motion consistency across 8-second segments. Users report 15 percent fewer artifacts than the prior version when they set the motion strength slider to 0.65. Veo 3.1 adds support for 4K output at 30 fps when you enable the high-res toggle before generation.
Combine reference footage with new motion
Upload a short reference clip to the Reference to Video page. The system extracts pose and camera path data, then applies it to a new subject. A 4-second reference at 720p works best; longer files increase processing time by roughly 40 percent.
Frame-by-frame adjustments
Use the First to Last Frame tool when you need precise control. Supply a start image and an end image, then set the number of in-between frames to 48. The model interpolates motion at 0.8 strength by default.
Another option is Image to Video. Drop a still frame, choose duration (3, 5 or 8 seconds), and pick a model. Sora 2 generates smoother camera pans while Nano Banana Pro keeps character faces stable across 12 frames.
Add dialogue and sync audio
Once the visual track is ready, open Lip Sync Video. Upload an audio file or paste text for Gemini 3.1 Flash TTS to generate the voice track first. The tool aligns mouth shapes to phonemes at 30 fps. Export the finished file as an MP4 with embedded captions.
For background music, head to Music Generation. Select a 15-second loop in the key of C minor, then lower the volume to -12 dB before mixing.
Refine with captions and effects
Run the clip through Auto Captions. The system detects speech every 0.8 seconds and places text in the lower third. Choose the bold sans-serif font at 48 px size for mobile viewing.
Apply AI Video Effects next. The motion blur filter at 35 percent strength reduces jitter on fast pans. Export at 1080p or 4K depending on the target platform.
Compare models side by side
| Model | Max length | Resolution | Best for | Credit cost |
|---|---|---|---|---|
| Seedance 2.0 | 8 s | 1080p | Character motion | 12 |
| Kling 3.0 | 10 s | 1080p | Complex camera moves | 15 |
| Veo 3.1 | 6 s | 4K | High-detail environments | 18 |
| Sora 2 | 5 s | 1080p | Text-to-scene consistency | 14 |
Export and iterate
Download the final MP4, then return to the dashboard to run a new version with updated prompts. Each iteration consumes credits based on length and resolution. Track usage in the billing panel at /#pricing.
Text to Video remains the fastest entry point for most creators who want to edit video with ai today.
Frequently Asked Questions
How do I edit video with ai for free?▾
Create an account at the register page, receive starter credits, then run short generations in the text-to-video or lip-sync tools. Paid top-ups begin after the initial balance is used.
Which model is best for talking head videos?▾
Lip Sync paired with Gemini 3.1 Flash TTS produces the most accurate mouth movements at 30 fps. Upload audio first, then choose the 5-second duration option.
Can I change the background of an existing clip?▾
Yes. Load the clip into Video to Video and enter a new background prompt. The model preserves subject motion while replacing the scene at 0.7 strength.
What file formats does the platform export?▾
All video tools export MP4 at 1080p or 4K. Captions can be burned in or delivered as a separate SRT file.
How many seconds can one generation produce?▾
Seedance 2.0 supports up to 8 seconds, Kling 3.0 up to 10 seconds, and Veo 3.1 up to 6 seconds before you need to chain multiple clips.
