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

# Subtitles · Speech-to-Text

> Auto-transcribe the speech in a video or audio clip into subtitle text, ready to feed the Subtitles node.

<Frame caption="Subtitles · Speech-to-Text · 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="Subtitles · Speech-to-Text" width="800" height="450" data-path="images/nodes/_placeholder.svg" />
</Frame>

## What this node does

**Subtitles · Speech-to-Text** runs a speech-to-text workflow over an upstream **video** or **audio** and returns the transcription as `COMFYTV_TEXT` (subtitle cues). Pick a **workflow**, wire a clip, press **▶ Run**; the transcription runs as a backend workflow (a real model pass on the server), so it needs the corresponding model installed.

You must provide either an **audio** or a **video** input. If **audio** is wired it is transcribed directly; otherwise the **video** is used. Running with neither raises an error.

## When to use it

* Generate captions for a talking-head clip, then burn them with **Subtitles**.
* Get a rough transcript of a voiceover or interview for editing.
* Kick off a caption workflow without hand-typing an SRT.

## Parameters

### workflow

Which speech-to-text workflow to run. The dropdown lists the installed `speech-to-text` workflows (`labels_for('speech-to-text')`), with a sensible default. Each option maps to a backend workflow JSON and its required model.

## Inputs and outputs

| Slot                | Type            | Meaning                                              |
| ------------------- | --------------- | ---------------------------------------------------- |
| **audio** (in)      | `COMFYTV_AUDIO` | Optional audio to transcribe (used first if present) |
| **video** (in)      | `COMFYTV_VIDEO` | Optional video to transcribe (used if no audio)      |
| **subtitles** (out) | `COMFYTV_TEXT`  | The transcription / subtitle cue text                |

## Tips

* Wire **subtitles** → the **subs\_text** input of the **Subtitles** node to go straight from speech to burned-in captions.
* Provide **audio** when you have a clean audio track — it skips using the video's soundtrack.
* The available workflows and their models depend on your install; if the dropdown is empty or Run fails, check the speech-to-text workflow/model is present.

## Types and bridges

`COMFYTV_TEXT`, `COMFYTV_VIDEO` and `COMFYTV_AUDIO` are ComfyTV project snapshots, not native ComfyUI types. To interoperate with native ComfyUI nodes, insert a **Bridge** (`ComfyTV/Bridge`). See [bridges.md](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md).

## Related nodes

* **Subtitles** — burns the generated cues onto the video.
* **Title** — a single styled title card.