---
title: estimatedOutputFileLength
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avassetexportsession/estimatedoutputfilelength
---

# estimatedOutputFileLength

The estimated length of the exported file, in bytes.

## Declaration

```swift
var estimatedOutputFileLength: Int64 { get }
```

## See Also

### Estimating file length and duration

- [estimateOutputFileLength(completionHandler:)](avfoundation/avassetexportsession/estimateoutputfilelength(completionhandler:).md)