# Support for conversion using OCR optical character recognition)
<a name="support-for-ocr"></a>

You can convert source captions that are in DVB-Sub or SCTE-27 format into output captions that are in WebVTT format. AWS Elemental Live uses OCR (optical character recognition) to perform this conversion. 

**Enabling the OCR feature**

If you want to use OCR conversion, you must enable the feature when you install or upgrade Elemental Live. For more information, see these guides:
+ [AWS Elemental Live Installation Guide](https://docs.aws.amazon.com/elemental-live/latest/installguide/)
+ [AWS Elemental Live Upgrade Guide](https://docs.aws.amazon.com/elemental-live/latest/upgradeguide/)

You can determine if the feature has already been enabled. In the event, go to the output section and start to set up a captions encode. Choose WebVTT as the output format. If the feature is enabled, a list of languages (language libraries) appears. 

**Note**  
When you enable OCR, you must make sure that you don't use the `--skip-all` option with the command to install, upgrade or configure. If you use that skip option, you won't see the prompts to enable OCR conversion.

**Using OCR conversion**

For more information about setting up to convert captions using OCR, see [Sidecar captions or SMPTE-TT captions in MS Smooth](output-sidecar-and-smptett-mss.md). 

For a list of languages supported with OCR conversion, see [Reference: Languages supported with OCR captions](captions-ocr-languages.md).