AI Video Frame Interpolation Guide
Step-by-step guide to AI video frame interpolation. Covers Seedance 2.0, Kling 3.0, exact inputs, outputs, credit costs, and a numbered workflow for raising frame rates.
TL;DR
AI video frame interpolation creates new frames between existing ones to increase frame rate. Use Seedance 2.0 or Kling 3.0 on 1080p 24 fps clips to reach 60 fps. Follow the 8-step workflow above, watch for motion artifacts on fast pans, and start testing inside the image-to-video tool.
What AI video frame interpolation is
AI video frame interpolation generates new frames between existing ones to raise frame rate without motion blur. It does not duplicate frames or stretch playback time.
How it works under the hood
Models analyze motion vectors between two source frames and synthesize pixels for each intermediate frame. Seedance 2.0 uses optical flow estimation trained on 240 fps source footage. Kling 3.0 adds depth-aware warping to handle occlusions at 1080p resolution. Veo 3.1 processes 16-frame windows at once and outputs 4K frames. Wan 2.7 limits interpolation to 2x or 4x speedups only.
Inputs and outputs
A typical run accepts a 5-second 1080p MP4 at 24 fps and returns the same clip at 60 fps. Output file size grows from 12 MB to 28 MB. Credit cost on Flixly sits at 8 credits for a 720p 4-second clip and 14 credits for 1080p.
| Model | Max output fps | Max resolution | Typical credits for 5 s |
|---|---|---|---|
| Seedance 2.0 | 120 | 4K | 22 |
| Kling 3.0 | 60 | 1080p | 14 |
| Veo 3.1 | 90 | 4K | 19 |
| Wan 2.7 | 48 | 720p | 9 |
Where frame interpolation appears in workflows
Creators apply it after generating base footage with Text to Video. They then pass the result through Image to Video for extra motion. Final polish often uses Video to Video to correct artifacts before export.
Step-by-step instructions
- Upload your 24 fps source clip to the video workspace and select the 2x interpolation preset.
- Choose Seedance 2.0 or Kling 3.0 from the model dropdown; both accept 1080p input natively.
- Set target frame rate to 60 fps and enable motion blur compensation at 0.4 strength.
- Preview the first 10 frames; adjust the occlusion threshold if edges show ghosting.
- Queue the job; a 5-second 1080p clip processes in roughly 45 seconds on current hardware.
- Download the 60 fps MP4 and run a quick check in your editor for dropped frames.
- If needed, feed the output into AI Video Effects for final color grading.
- Store the project file so you can re-run with different models later.
Common limitations
Seedance 2.0 struggles with fast camera pans above 45 degrees per second. Kling 3.0 can introduce color shifts on skin tones when source lighting changes rapidly. Always test a 2-second segment before committing full credit spend.
Where to start
Begin with a short test clip inside the Image to Video tool and apply 2x interpolation.
FAQ
What frame rate jump works best with Sora 2? Sora 2 handles 24 fps to 48 fps cleanly but shows artifacts above 72 fps on complex scenes.
How many new frames does Wan 2.7 insert per second? Wan 2.7 inserts one new frame between every pair, turning 24 fps into 48 fps exactly.
Can I use frame interpolation on character-consistent clips from Reference to Video? Yes. Run the reference output through the interpolation step; keep the same seed value to preserve character details.
Does Motion Poster support frame interpolation? Motion Poster exports at fixed 30 fps; you must route its output to a separate interpolation pass for higher rates.
What input length avoids credit waste on 4K jobs? Keep test clips under 8 seconds when targeting 4K output with Veo 3.1.
Frequently Asked Questions
What frame rate jump works best with Sora 2?▾
Sora 2 handles 24 fps to 48 fps cleanly but shows artifacts above 72 fps on complex scenes.
How many new frames does Wan 2.7 insert per second?▾
Wan 2.7 inserts one new frame between every pair, turning 24 fps into 48 fps exactly.
Can I use frame interpolation on character-consistent clips from reference-to-video?▾
Yes. Run the reference output through the interpolation step; keep the same seed value to preserve character details.
Does motion-poster support frame interpolation?▾
Motion Poster exports at fixed 30 fps; you must route its output to a separate interpolation pass for higher rates.
What input length avoids credit waste on 4K jobs?▾
Keep test clips under 8 seconds when targeting 4K output with Veo 3.1.
