# Support for conversion using OCR optical character recognition)
Support for OCR conversionWebVTT output captions using OCR

Starting with version 2.22.0, Elemental Live supports the ability to produce WebVTT output captions by converting object-based source captions that are in DVB-Sub or SCTE-27 format. Elemental Live uses OCR (optical character recognition) to perform this conversion. The section on supported captions and the section on working with captions have been revised. 

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).