---
title: startIndex
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmblockbufferprotocol/startindex
---

# startIndex

## Declaration

```swift
var startIndex: Int { get }
```

## See Also

### Inspecting a Block Buffer

- [dataLength](coremedia/cmblockbufferprotocol/datalength.md)
- [endIndex](coremedia/cmblockbufferprotocol/endindex.md)
- [owner](coremedia/cmblockbufferprotocol/owner.md)