# Burn subtitles into a video

Advertisement videos with subtitles have higher engagement rates compared to those without. With browsers often starting video ads muted, captions are a great way to capture an audience's attention and get your message across.

However, since you often cannot rely on player compatibility, closed captions (that allow the viewer to select a language) are not an option. In that case, you might want to consider open captions, also known as "burned-in", "hard-coded", or "baked on" captions. Open captions means that subtitles are made up of pixels in the actual video itself. In this demo, we'll show you how to do it.

Since both the video and the srt file will be coming from the same source (uploads) and are uploaded in one go, we'll use [🤖/file/filter](/docs/robots/file-filter.md) to determine which file is which.

Step 1

### Handle uploads

We can handle uploads of your users directly. [Learn more ›](/services/handling-uploads.md)

![subtitle.srt](https://tl-preview.tlcdn.com/demo-preview/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt?w=214\&h=300\&cb=11)

[subtitle.srt](https://demos.transloadit.com/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt)

application/x-subrip · 302 B

[surf.mp4](https://demos.transloadit.com/6c/e3993240134ed78fb762afed75906b/surf.mp4)

Video · 32 MB · 22s · 1280 × 720

```
":original": {
  "robot": "/upload/handle"
}
```

🤖 [/upload/handle](/docs/robots/upload-handle.md)

This bot receives uploads that your users throw at you from browser or apps, or that you throw at us programmatically

Step 2

### Filter files

We let you reject, or direct files against different encoding Steps. [Learn more ›](/services/file-filtering.md)

[surf.mp4](https://demos.transloadit.com/6c/e3993240134ed78fb762afed75906b/surf.mp4)

Video · 32 MB · 22s · 1280 × 720

```
"video_filtered": {
  "use": ":original",
  "robot": "/file/filter",
  "result": true,
  "accepts": [
    [
      "${file.mime}",
      "regex",
      "video"
    ]
  ],
  "error_on_decline": false
}
```

🤖 [/file/filter](/docs/robots/file-filter.md)

This bot directs files to different encoding Steps based on your conditions

Step 3

### Filter files

We let you reject, or direct files against different encoding Steps. [Learn more ›](/services/file-filtering.md)

![subtitle.srt](https://tl-preview.tlcdn.com/demo-preview/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt?w=214\&h=300\&cb=11)

[subtitle.srt](https://demos.transloadit.com/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt)

application/x-subrip · 302 B

```
"subtitle_filtered": {
  "use": ":original",
  "robot": "/file/filter",
  "result": true,
  "accepts": [
    [
      "${file.mime}",
      "regex",
      "application/x-subrip"
    ]
  ],
  "error_on_decline": false
}
```

🤖 [/file/filter](/docs/robots/file-filter.md)

This bot directs files to different encoding Steps based on your conditions

Step 4

### Add subtitles to videos

We offer a variety of video encoding features like optimizing for different devices, merging, injecting ads, changing audio tracks, or adding company logos. [Learn more ›](/services/video-encoding.md)

[surf.mp4](https://demos.transloadit.com/42/96fd9d491c4b2d9cb2e132035063b8/surf.mp4)

Video · 3.5 MB · 22s · 1280 × 720

```
"subtitled": {
  "use": {
    "bundle_steps": true,
    "steps": [
      {
        "name": "video_filtered",
        "as": "video"
      },
      {
        "name": "subtitle_filtered",
        "as": "subtitles"
      }
    ]
  },
  "robot": "/video/subtitle",
  "ffmpeg_stack": "v7",
  "preset": "ipad-high",
  "subtitles_type": "burned"
}
```

🤖 [/video/subtitle](/docs/robots/video-subtitle.md)

This bot adds subtitles and closed captions to videos

Step 5

### Export files to Amazon S3

We export to the storage platform of your choice. [Learn more ›](/services/file-exporting.md)

`:original`

* [https://demos.transloadit.com/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt⁠](https://demos.transloadit.com/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt)
* [https://demos.transloadit.com/6c/e3993240134ed78fb762afed75906b/surf.mp4⁠](https://demos.transloadit.com/6c/e3993240134ed78fb762afed75906b/surf.mp4)

`video_filtered`

* [https://demos.transloadit.com/6c/e3993240134ed78fb762afed75906b/surf.mp4⁠](https://demos.transloadit.com/6c/e3993240134ed78fb762afed75906b/surf.mp4)

`subtitle_filtered`

* [https://demos.transloadit.com/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt⁠](https://demos.transloadit.com/00/07a2815df4479fa86fb879ee9d3952/subtitle.srt)

`subtitled`

* [https://demos.transloadit.com/42/96fd9d491c4b2d9cb2e132035063b8/surf.mp4⁠](https://demos.transloadit.com/42/96fd9d491c4b2d9cb2e132035063b8/surf.mp4)

```
"exported": {
  "use": [
    ":original",
    "video_filtered",
    "subtitle_filtered",
    "subtitled"
  ],
  "robot": "/s3/store",
  "credentials": "demo_s3_credentials",
  "url_prefix": "https://demos.transloadit.com/"
}
```

🤖 [/s3/store](/docs/robots/s3-store.md)

This bot exports encoding results to Amazon S3

## Live Demo. See for yourself

Loading Uppy demo…

This live demo is powered by [Uppy⁠](https://uppy.io/docs/guides/uppy-transloadit/), our open source file uploader that you can also use without Transloadit, and [tus⁠](https://tus.io), our open protocol for resumable file uploads that is making uploading more reliable across the world.

## Build this in your own language

```
<!-- This pulls Uppy from our CDN -->
<!-- For smaller self-hosted bundles, install Uppy and plugins manually: -->
<!-- npm i --save @uppy/core @uppy/dashboard @uppy/remote-sources @uppy/transloadit ... -->
<link
  href="https://releases.transloadit.com/uppy/v3.10.0/uppy.min.css"
  rel="stylesheet"
/>
<button id="browse">Select Files</button>
<script type="module">
  import {
    Uppy,
    Dashboard,
    ImageEditor,
    RemoteSources,
    Transloadit,
  } from 'https://releases.transloadit.com/uppy/v3.10.0/uppy.min.mjs'
  const uppy = new Uppy()
    .use(Transloadit, {
      waitForEncoding: true,
      alwaysRunAssembly: true,
      assemblyOptions: {
        params: {
          // It's often better store encoding instructions in your account
          // and use a `template_id` instead of adding these steps inline
          steps: {
            ':original': {
              robot: '/upload/handle',
            },
            video_filtered: {
              use: ':original',
              robot: '/file/filter',
              result: true,
              accepts: [['${file.mime}', 'regex', 'video']],
              error_on_decline: false,
            },
            subtitle_filtered: {
              use: ':original',
              robot: '/file/filter',
              result: true,
              accepts: [['${file.mime}', 'regex', 'application/x-subrip']],
              error_on_decline: false,
            },
            subtitled: {
              use: {
                bundle_steps: true,
                steps: [
                  {
                    name: 'video_filtered',
                    as: 'video',
                  }, 
,                  {
                    name: 'subtitle_filtered',
                    as: 'subtitles',
                  }, 
                ],
              },
              robot: '/video/subtitle',
              ffmpeg_stack: 'v7',
              preset: 'ipad-high',
              subtitles_type: 'burned',
            },
            exported: {
              use: [':original', 'video_filtered', 'subtitle_filtered', 'subtitled'],
              robot: '/s3/store',
              credentials: 'demo_s3_credentials',
              url_prefix: 'https://demos.transloadit.com/',
            },
          },
        },
      },
    })
    .use(Dashboard, { trigger: '#browse' })
    .use(ImageEditor, { target: Dashboard })
    .use(RemoteSources, {
      companionUrl: 'https://api2.transloadit.com/companion',
    })
    .on('complete', ({ transloadit }) => {
      // Due to `waitForEncoding:true` this is fired after encoding is done.
      // Alternatively, set `waitForEncoding` to `false` and provide a `notify_url`
      console.log(transloadit) // Array of Assembly Statuses
      for (const assembly of transloadit) {
        console.log(assembly.results) // Array of all encoding results
      }
    })
    .on('error', (error) => {
      console.error(error)
    })
</script>

```

[Read docs: Browsers](/docs/sdks/uppy.md)

## So many ways to integrate

Transloadit is a service for companies with developers. And there are many ways developers can put Transloadit to good use inside your company to automate media processing.

#### Bulk imports

Add one of our [import Robots](/services/file-importing.md) to acquire and transcode massive media libraries.

#### Handling uploads

We are *the* experts at reliably [handling uploads](/services/handling-uploads.md). We wrote the [protocol⁠](https://tus.io/) for it.

#### Front-end integration

We integrate with web browsers via our next-gen file uploader [Uppy⁠](https://uppy.io/docs/guides/uppy-transloadit/) and SDKs for Android and iOS.

#### Back-end integration

Send us batch jobs in any server language using one of our [SDKs](/docs/sdks.md) or directly interfacing with our [REST API](/docs/api.md).

#### Pingbacks

Configure a [notify\_url](/services/content-delivery.md) to let your server receive transcoding results JSON in the `transloadit` POST field.

#### On-demand

Use our [Smart CDN](/services/file-importing.md) to adapt files on-demand and stream them directly to your users.

[Browsers](/docs/sdks/uppy.md)[TransloaditKit](/docs/sdks/transloaditkit.md)[Ruby SDK](/docs/sdks/ruby-sdk.md)[HTTP REST API](/docs/api.md)[Python SDK](/docs/sdks/python-sdk.md)[PHP SDK](/docs/sdks/php-sdk.md)[Node.js SDK](/docs/sdks/node-sdk.md)[Java SDK](/docs/sdks/java-sdk.md)[Go SDK](/docs/sdks/go-sdk.md)[cURL](/docs/sdks/curl.md)[Convex](/docs/sdks/convex.md)

[Browsers](/docs/sdks/uppy.md)[TransloaditKit](/docs/sdks/transloaditkit.md)[Ruby SDK](/docs/sdks/ruby-sdk.md)[HTTP REST API](/docs/api.md)[Python SDK](/docs/sdks/python-sdk.md)[PHP SDK](/docs/sdks/php-sdk.md)[Node.js SDK](/docs/sdks/node-sdk.md)[Java SDK](/docs/sdks/java-sdk.md)[Go SDK](/docs/sdks/go-sdk.md)[cURL](/docs/sdks/curl.md)[Convex](/docs/sdks/convex.md)

[Browsers](/docs/sdks/uppy.md)[TransloaditKit](/docs/sdks/transloaditkit.md)[Ruby SDK](/docs/sdks/ruby-sdk.md)[HTTP REST API](/docs/api.md)[Python SDK](/docs/sdks/python-sdk.md)[PHP SDK](/docs/sdks/php-sdk.md)[Node.js SDK](/docs/sdks/node-sdk.md)[Java SDK](/docs/sdks/java-sdk.md)[Go SDK](/docs/sdks/go-sdk.md)[cURL](/docs/sdks/curl.md)[Convex](/docs/sdks/convex.md)

## Other cool demos

* [View demo→Video EncodingAdd an audio track to video footage](/demos/video-encoding/add-audio-track-to-video-footage.md)
* [View demo→Video EncodingAdd an empty audio track to still video](/demos/video-encoding/add-empty-audio-track-to-still-video.md)
* [View demo→Document ProcessingAdd a header or footer to a PDF](/demos/document-processing/add-header-or-footer-to-pdf.md)

Try Transloadit

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