---
title: producesCombinableFragments
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avassetwriter/producescombinablefragments
---

# producesCombinableFragments

A Boolean value that indicates whether the asset writer outputs movie fragments suitable for combining with others.

## Declaration

```swift
var producesCombinableFragments: Bool { get set }
```

## Discussion

Discussion The default value is false. Set the value to true when you use multiple asset writers to produce distinct streams that complement each other, such as HLS encodings or bit rate variants. You can’t set this property after writing starts.

## See Also

### Configuring fragment output

- [movieFragmentInterval](avfoundation/avassetwriter/moviefragmentinterval.md)
- [initialMovieFragmentInterval](avfoundation/avassetwriter/initialmoviefragmentinterval.md)
- [initialMovieFragmentSequenceNumber](avfoundation/avassetwriter/initialmoviefragmentsequencenumber.md)
- [overallDurationHint](avfoundation/avassetwriter/overalldurationhint.md)
- [movieTimeScale](avfoundation/avassetwriter/movietimescale.md)