---
title: sampleIndexWithinChunk
framework: MediaExtension
role: symbol
role_heading: Instance Property
platforms: [macOS 14.0+]
path: mediaextension/mesamplecursorchunk/sampleindexwithinchunk
---

# sampleIndexWithinChunk

The offset index of the sample within the chunk, in samples.

## Declaration

```swift
var sampleIndexWithinChunk: CFIndex { get }
```

## See Also

### Inspecting a chunk

- [byteSource](mediaextension/mesamplecursorchunk/bytesource.md)
- [chunkStorageRange](mediaextension/mesamplecursorchunk/chunkstoragerange.md)
- [chunkInfo](mediaextension/mesamplecursorchunk/chunkinfo.md)