# Create sidecar or SMPTE-TT captions encodes
<a name="output-sidecar-and-smptett-mss"></a>

Follow this procedure if the format of the captions asset that you want to add in the MediaLive channel is [a sidecar](categories-captions.md), or if the format is SMPTE-TT for a Microsoft Smooth output group. 

You set up the captions and video in the same output.

1. In the **Create channel** or **Edit channel** page for the channel, in the **Channel** panel, find the output group where you want to set up captions.

1. Create a new output in this output group. 

1. In the output, go to the **Stream settings** and choose **Add caption**, then **Create a new caption encode**. Captions fields appear. 

1. Complete the following fields:
   + **Captions description name**: Enter a name that is unique in the channel, for example, **Embedded**.
   + **Captions selector name**: Select the captions selector that you created when you [created the captions selectors in the input](identify-captions-in-the-input.md). Specify the selector that identifies the captions asset that is the source for the captions in this output.
   + **Captions settings**: Choose the captions format for the output captions. Depending on the format, more fields appear.

1. Choose **Additional settings**. More fields appear. See the table after this procedure for information about which fields to complete for each format.

1. You now have a captions encode that is fully defined. Repeat these steps to create more captions in this output group.


| Field | Topic | Applicable formats | Description | 
| --- | --- | --- | --- | 
| Style Control, Fill Line Gap, Font Family, Copyright Holder | Captions style | EBU-TT-D | See [Font styles for EBU-TT-D](ebu-tt-font-styles.md) | 
| Style Control | Captions style | TTML, Web-VTT | See [Font styles for TTML](ttml-font-styles.md) or [Font styles for WebVTT](webvtt-font-styles.md) | 
| Language code, Language description | Language information for this specific caption | All formats | Optional. For information, choose the Info link next to each field. | 
| Accessibility, Caption DASH Roles, DVB DASH accessibility | Accessibility data | All formats | [Including accessibility data in captions in MediaLive](captions-accessibility.md) | 
| PIDs | PID assignment | Teletext | [PIDs for Teletext](complete-the-pids-for-teletext.md),  |