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# CMSampleBuffer.SampleProperties

Information about a sample in the sample buffer.

```
struct SampleProperties
```

## Overview

Each sample buffer holds a [`CMSampleBuffer.SamplePropertiesCollection`](/documentation/CoreMedia/CMSampleBuffer/SamplePropertiesCollection) which provides this sample information for each sample in
the sample buffer.

## Topics

### Initializers

[`init(size: Int?, timing: CMSampleTimingInfo, attachments: CMSampleBuffer.SampleAttachments)`](/documentation/CoreMedia/CMSampleBuffer/SampleProperties/init(size:timing:attachments:))

### Instance Properties

[`var attachments: CMSampleBuffer.SampleAttachments`](/documentation/CoreMedia/CMSampleBuffer/SampleProperties/attachments)

Attachments of the sample.

[`var size: Int?`](/documentation/CoreMedia/CMSampleBuffer/SampleProperties/size)

Size in bytes of the sample.

[`var timing: CMSampleTimingInfo`](/documentation/CoreMedia/CMSampleBuffer/SampleProperties/timing)

Timing information of the sample.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

---

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