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

# Video & audio

> Video **generation** lives in the Generate group (see [generate.md](generate.md)). This page covers the **editing** stages in **ComfyTV / Video** and the separation stages in **ComfyTV / Audio**. Video Upscale, Subtitle Erase, and Demucs vocal/bg split are pending — see [roadmap.md](roadmap.md).

<img src="https://mintcdn.com/comfytv/dMkMxJDZdIo4YzAU/images/video-tools.png?fit=max&auto=format&n=dMkMxJDZdIo4YzAU&q=85&s=ab4d04a38cffc679e83e0a62ddedea5f" alt="Video editing stages" width="609" height="507" data-path="images/video-tools.png" />

***

## Video editing (ComfyTV / Video)

Feed a video (from a **Generate → Video** stage or a **Load Video** node) into any of these:

| Stage                         | What it does                                                                                                           | Status    |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------------- | --------- |
| **Video Clip**                | Trim to a start/end range.                                                                                             | ✅ PyAV    |
| **Video Crop**                | Crop to a rectangular region.                                                                                          | ✅ PyAV    |
| **Video Resize**              | Change resolution (width / height) preserving frame rate.                                                              | ✅ PyAV    |
| **Video Extract Frame**       | Pull a single still (first / last / at time). The result is a `COMFYTV_IMAGE`.                                         | ✅ PyAV    |
| **↪ Extend** (toolbar action) | One-click chain — extract the source's last frame, spawn a new Video Stage, wire that frame as the I2V starting image. | ✅         |
| **Video Upscale**             | Frame-by-frame upscale.                                                                                                | ⏳ pending |
| **Subtitle Erase (Smart)**    | Auto-detect and remove burned-in subtitles.                                                                            | ⏳ pending |
| **Subtitle Erase (Region)**   | Remove subtitles inside a region you box.                                                                              | ⏳ pending |

***

## Audio (ComfyTV / Audio)

Take a video or audio track and split it:

| Stage                       | Output                               | Status    |
| --------------------------- | ------------------------------------ | --------- |
| **Demux · Audio Track**     | The audio extracted from a video.    | ✅ PyAV    |
| **Demux · Silent Video**    | The video with its audio stripped.   | ✅ PyAV    |
| **Audio · Vocals Only**     | Demucs voice-separated track.        | ⏳ pending |
| **Audio · Background Only** | Demucs instrumental / ambient track. | ⏳ pending |

The demux pair is meant to be used together — one node for the audio, one for the silent video — both wired from the same source clip. The 🔀 **Demux** toolbar action spawns both at once.

A separated / extracted audio track can be wired into a **Video Stage**'s optional `audio` input for audio-driven video (works with LTX 2.3 IA2V).