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# AVCaptionRenderer

An object that renders captions for display at a particular time.

```
class AVCaptionRenderer
```

## Overview

This object renders a caption scene for a given time from a collection of captions. If there aren’t any captions to display at the specified time, the renderer draws an empty flood fill with a zero alpha or a color.

## Topics

### Configuring the renderer

[`captions`](/documentation/AVFoundation/AVCaptionRenderer/captions)

The captions to render.

[`bounds`](/documentation/AVFoundation/AVCaptionRenderer/bounds)

The drawing bounds of caption scenes.

### Determining scene changes

[`captionSceneChanges(in:)`](/documentation/AVFoundation/AVCaptionRenderer/captionSceneChanges(in:))

Determine render time ranges within an enclosing time range to account for visual changes among captions.

[`AVCaptionRenderer.Scene`](/documentation/AVFoundation/AVCaptionRenderer/Scene)

An object that holds a time range and an associated state which indicates when the renderer draws output.

### Rendering a caption

[`render(in:for:)`](/documentation/AVFoundation/AVCaptionRenderer/render(in:for:))

Draw the captions for the time you specify.


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