> ## Documentation Index
> Fetch the complete documentation index at: https://comfytv.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Frame Interpolate

> Generates in-between frames to raise the frame rate or create smooth slow motion.

<Frame caption="Frame Interpolate · screenshot coming soon">
  <img src="https://mintcdn.com/comfytv/dMkMxJDZdIo4YzAU/images/nodes/_placeholder.svg?fit=max&auto=format&n=dMkMxJDZdIo4YzAU&q=85&s=b54171099e5b02d4313fe581171ebbcc" alt="Frame Interpolate" width="800" height="450" data-path="images/nodes/_placeholder.svg" />
</Frame>

## What this node does

**Frame Interpolate** uses ffmpeg's motion-compensated interpolation to synthesize new frames. In `retime_fps` mode it raises the clip to a target frame rate for smoother playback; in `slowmo` mode it stretches time and slows the clip down (also time-stretching the audio to match). It processes on **▶ Run** and writes a new video snapshot.

A source clip on **video** is required. In and out are both `COMFYTV_VIDEO`. To interoperate with native ComfyUI nodes, insert a **Bridge** — see the [bridge guide](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md).

## When to use it

* Make choppy 24/30 fps footage play smoother at 60 fps.
* Turn normal-speed footage into clean slow motion without a high-fps camera.
* Fill in missing frames so downstream motion looks fluid.

## Parameters

### mode

`retime_fps` (default) changes the output frame rate; `slowmo` slows the clip down and stretches audio to match.

### target\_fps

Target frame rate for `retime_fps`, `24`–`120`, default `60`. Ignored in `slowmo` mode.

### slow\_factor

How much to slow down in `slowmo` mode, `2.0`–`8.0` (step `0.5`), default `2.0`. `2.0` means half speed. Ignored in `retime_fps` mode. In slow-mo the interpolator generates `source_fps × slow_factor` intermediate frames.

### mi\_mode

Interpolation method: `mci` (motion-compensated, smoothest, default), `blend` (crossfade between frames), `dup` (duplicate frames — no true interpolation). Use `mci` for the cleanest result; drop to `blend`/`dup` if `mci` produces artifacts.

## Outputs

| Output    | Type            | Meaning                                             |
| --------- | --------------- | --------------------------------------------------- |
| **video** | `COMFYTV_VIDEO` | The retimed / slowed clip as a new project snapshot |

## Tips

* `mci` can smear on fast, chaotic motion or heavy occlusion; try `blend` there.
* `slowmo` retimes audio too (via chained atempo), so speech and music stay in sync at the slower speed.
* Denoise before interpolating — the motion estimator handles clean footage better.

## Related nodes

* **Video Denoise** — clean footage before interpolation for better motion estimates.
* **Deinterlace** — for interlaced sources, deinterlace first (its `field` rate already doubles frames).