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# AVSampleBufferGenerator

An object that creates sample buffers.

```
class AVSampleBufferGenerator
```

## Overview

Each request for `CMSampleBuffer` creation is described in an `AVSampleBufferRequest` object. The <doc://com.apple.documentation/documentation/CoreMedia/CMSampleBuffer> opaque objects are returned synchronously. If requested, sample data may be loaded asynchronously (depending on file format support).

## Topics

### Creating sample buffer generators

[`init(asset:timebase:)`](/documentation/AVFoundation/AVSampleBufferGenerator/init(asset:timebase:))

Creates a new sample buffer generator.

### Creating a sample buffer

[`makeSampleBuffer(for:)`](/documentation/AVFoundation/AVSampleBufferGenerator/makeSampleBuffer(for:))

Creates a sample buffer, and attempts to load its data asynchronously if requested.

[`makeBatch()`](/documentation/AVFoundation/AVSampleBufferGenerator/makeBatch())

Creates a batch object to handle generating multiple sample buffers.

[`makeSampleBuffer(for:addTo:)`](/documentation/AVFoundation/AVSampleBufferGenerator/makeSampleBuffer(for:addTo:))

Creates a sample buffer and attempts to defer I/O for its data.

[`createSampleBuffer(for:)`](/documentation/AVFoundation/AVSampleBufferGenerator/createSampleBuffer(for:))

Creates a new sample buffer reference for the specified buffer request.

### Retrieving sample buffer data

[`notifyOfDataReady(for:completionHandler:)`](/documentation/AVFoundation/AVSampleBufferGenerator/notifyOfDataReady(for:completionHandler:))

Notifies the sample buffer generator when data is ready for the sample buffer reference or an error has occurred.


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