Caption Every Live Stream. Automatically.

No editors. No delays. No third-party workflows.

Scribe listens to your stream, transcribes speech in real time, translates it into any language, and injects WebVTT subtitle tracks directly into your HLS or DASH manifest — so viewers get captions the moment you go live.

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Scribe subtitle playback in a video player

Live Captioning

Processing stream...

Subtitles active EN → FR · DE · ES

Scribe is a plugin for Ant Media Server that provides automatic subtitling for live video streams using speech-to-text technology. Developed by Raskenlund, the plugin extends Ant Media Server's capabilities, making live streaming more accessible and easier to manage.

The plugin captures audio from a live stream, converts speech into text, and injects subtitles directly into the video stream in real time. This allows broadcasters to deliver accessible, captioned content without requiring manual captioning or complex third-party workflows.

Real-Time Speech-to-Text

Convert live audio into subtitles with minimal latency.

Live Streams & VoD

Works with both live streaming and video-on-demand content.

Multi-Language Translation

Translate subtitles into multiple languages in real time.

HLS & DASH Support

Compatible with standard playback protocols and players.

Automatic Injection

Subtitles are added directly into the stream automatically.

Flexible Providers

Use cloud APIs or self-hosted transcription services.

1. Install the Plugin

Run the following command on your server:

curl -fsSL https://downloads.raskenlund.com/scribe/antmediaserver/install.sh | sudo bash

This installs the plugin, sets permissions, and restarts the service.

2. Open Scribe Dashboard

Go to:

http://<your-server>:5080/rest/scribe/ui/

NOTE: Make sure you have already logged into Ant Media Server in another tab.

Dashboard Preview

3. Configure Settings

Open Global Settings
Add Scribe license key
Add API credentials
Save changes

Global Settings

Then:

Restart the server
Open dashboard
Click Reload Configuration

It should show the license validated.

4. Install HLS Manifest Filter

To generate subtitles, the HLS manifest filter must be installed on your application in Ant Media Server.

Go to Dashboard
Select your application
Click Install Filter

Install Filter

Then restart the server again.

5. Enable & Configure Plugin

Enable Scribe plugin for selected application (default is OFF)
Set source language — e.g. en
Set target language — e.g. fr
Save the settings
Go to dashboard and click Reload Configuration

Translation Settings

6. Start Streaming

Publish a stream using RTMP, WebRTC, or any other supported protocol:

rtmp://domain-or-IP/live/streamId

7. Verify Output

Check AMS logs for scribe entries:

/usr/local/antmedia/log/ant-media-server.log

Then navigate to the streams directory:

cd /usr/local/antmedia/webapps/live/streams

You'll see .vtt subtitle files generated automatically alongside HLS segments.

Players requesting streamId.m3u8 or streamId_adaptive.m3u8 receive the manifest with subtitle tracks injected automatically — no special URL required.

8. Test Playback

Play your HLS (m3u8) or DASH (mpd) stream using a test player:

Subtitle Playback

Select the subtitle track from the available subtitles menu in the player.